CN202613414U

CN202613414U - Boiler fire making and steam exhaust utilization system in thermal power plant

Info

Publication number: CN202613414U
Application number: CN2012201608241U
Authority: CN
Inventors: 黎芙蓉
Original assignee: CHINA CEC ENGINEERING Corp
Current assignee: CHINA CEC ENGINEERING Corp
Priority date: 2012-04-17
Filing date: 2012-04-17
Publication date: 2012-12-19
Anticipated expiration: 2022-04-17

Abstract

A boiler fire making and steam exhaust utilization system in a thermal power plant is characterized in that a branch pipe (1) is led out from the rear part of an outlet cut-off valve (11) of each boiler (10) to the front part of a main steam mother pipe cut-off valve (12), each branch pipe is led to be gathered to a main steam starting bypass mother pipe (2) after passing through a cut-off valve (6), then the mother pipe (2) is led to a temperature and pressure reduction device (3) after passing through a cut-off valve (7), and a steam pipeline is divided into two paths after passing through a cut-off valve (8), wherein one path is directly connected to a steam pipe (4) of a heat supply mother pipe and then is sent to each steam used workshop through the heat supply mother pipe, and the other path is sent to a steam pipe (5) of a deoxygenization heating mother pipe after passing through a cut-off valve (9) and then is supplied with water through a deaerator heating boiler. According to the utility model, steam discharged into air by the boiler and meeting temperature and pressure requirements is comprehensively utilized and is used for heating boiler water supply and sending to heat consumers, the time of the boiler discharging the steam into air is shortened, the amount of the steam discharged into air by the boiler is reduced, the noise generated when the boiler discharges the steam into air is lowered, the energy is saved, the emission is reduced, the waste is turned into wealth, and the unit starting unit is lowered.

Description

The thermal power plant boiler steam discharge of lighting a fire utilizes system

Affiliated technical field

The utility model belongs to boiler plant, is that a kind of thermal power plant boiler steam discharge of lighting a fire utilizes system.

Background technology

The start-up course of thermal power plant boiler is a boiler by igniting, boost, to the steam turbine steam supply to process with given load.The blow-off line of lighting a fire of Small-scale Heat Power Plant boiler setting at present, main steam system adopts single piping-main scheme or switches piping-main scheme.Because boiler cold-state is long start-up time, so the steam that present boiler startup process produces is long to empty drain time, a large amount of steam are wasted, and the noise that produces is big.

Summary of the invention

The utility model is intended to develop a kind of boiler steam discharge of lighting a fire and utilizes system, will reach the integrated steam using of temperature, pressure requirement, shorten boiler in start-up course to the time of empty steam discharge, reach the effect of energy-saving and emission-reduction.

The technical scheme of utility model: the thermal power plant boiler steam discharge of lighting a fire utilizes system; It is characterized in that: behind each boiler export shut-off valve, to the female pipe of main steam shut-off valve, respectively draw an arm; Drawing the female pipe of past main steam startup bypass through every arm behind the shut-off valve concentrates; After causing reducing-and-cooling plant by the female pipe of this main steam startup bypass through shut-off valve again; Steam pipework is sent to each through the female pipe of heat supply and uses garage through being divided into two the tunnel: the one tunnel behind the shut-off valve for directly being connected to the steam pipe of the female pipe of heat supply then; Another Lu Zewei delivers to the female steam pipe of managing of deoxygenation heating through shut-off valve, feeds water through the oxygen-eliminating device heating boiler.

The advantage of the utility model: on the basis of present steam power plant main steam system, increase main steam and start bypath system, in the boiler cold-state start-up course; With present boiler to sky discharging, reach the steam that temperature and pressure requires and fully utilize, be used for the heating boiler feedwater and be sent to hot user, shorten boiler to the empty steam discharge time; Reduce boiler to empty displacement; Reduce the noise that empty steam discharge is produced owing to boiler, energy-saving and emission-reduction are turned waste into wealth; Reduce the unit starting cost, obtained tangible economic benefit and environmental benefit.

Description of drawings

Accompanying drawing is the system diagram of the utility model, and wherein thick line pipeline and equipment start bypath system for newly-increased main steam, and fine rule pipeline and equipment are present main steam system.

Among the figure: the 1-arm, the female pipe of 2-, 3-reducing-and-cooling plant, 4-are to the steam pipe of the female pipe of heat supply, and 5-is to the steam pipe of the female pipe of deoxygenation heating, 6-shut-off valve, 7-shut-off valve, 8-shut-off valve, 9-shut-off valve, 10-boiler, 11-shut-off valve, 12-shut-off valve

The specific embodiment

Further specify the content of utility model below in conjunction with the embodiment of accompanying drawing.

Certain enterprise's self-contained thermoelectric plant is provided with two HTHP CFBBs, the condensing steam turbine generator group of drawing gas, every boiler setting at present the light a fire blow-off line and the steam discharge silencer of lighting a fire; Main steam system adopts single piping-main scheme, and the main steam line that is sent to steam turbine from two boilers is set.

At (shown in fine rule among the figure) on the basis of present main steam system; Increase main steam and start bypath system (shown in thick line among the figure); Comprise from two boilers (10) outlets shut-off valves (11) back, to the preceding arm (1) of respectively drawing of main steam female pipe shut-off valve (12); Through shut-off valve (6) back two arms draw start the female pipe of bypass (2) and concentrate toward a main steam after, cause reducing-and-cooling plant (3) by this mother's pipe (2) through shut-off valves (7) again, behind the steam process shut-off valve (8); Be divided into two the tunnel: the one tunnel for directly being connected to the steam pipe (4) of the female pipe of heat supply, be sent to each through the female pipe of heat supply and use garage; Another Lu Zewei delivers to the female steam pipe (5) of managing of deoxygenation heating through shut-off valve (9), feeds water through the oxygen-eliminating device heating boiler.

Claims

1. the thermal power plant boiler steam discharge of lighting a fire utilizes system; It is characterized in that: from each boiler (10) outlet shut-off valve (11) back, to the preceding arm (1) of respectively drawing of main steam female pipe shut-off valve (12); Drawing the past main steam startup female pipe of bypass (2) through every the arm in shut-off valve (6) back concentrates; Cause reducing-and-cooling plant (3) by this mother's pipe (2) through shut-off valve (7) again; Being divided into two the tunnel: the one tunnel behind the steam pipework process shut-off valve (8) is the steam pipe (4) that directly is connected to the female pipe of heat supply, manages to be sent to through the heat supply mother again and respectively uses garage; Other one the tunnel then for deliver to the steam pipe (5) of the female pipe of deoxygenation heating through shut-off valve (9), feeds water through the oxygen-eliminating device heating boiler.