A deep peak regulation steam turbine system and control method for cogeneration units include steam turbines and high pressure heaters. Each high pressure heater is equipped with a reverse valve of the extraction pipeline and a shut-off valve of the extraction pipeline. The characteristics of the system are as follows: an electric shut-off valve is set at the inlet side of each high pressure heater in the extraction pipeline of the steam turbine, and an electric shut-off valve and a shut-off valve of the extraction pipeline are set at the entrance side of each high pressure heater. Between the valve breaking group and the electric shut-off door of the high-pressure heater inlet, there is a steam extracting pipe. The electric shut-off valve and the temperature reducing and pressure reducing device are set successively on the steam extracting pipe according to the steam flow direction. The end of the steam extracting and extracting pipe of each high-pressure heater is assembled into the heating steam extracting branch and the heating steam extracting branch and the main pipe are assembled into the heating steam extracting branch and supplied to the heating network heating system. The invention has the advantages of simple, low investment, good operation condition, safety and reliability, simple control method, large additional unit heat supply and steam extraction amount, and low total external heat supply of corresponding high-pressure heater group steam extraction.
【技术实现步骤摘要】
一种热电联产机组深度调峰汽机系统及控制方法
本专利技术属于火力发电厂热电联产机组深度调峰汽机系统改造技术,尤其是涉及一种满足深度调峰要求,提高机组供热能力,满足供热负荷需求,长期安全稳定运行的深度调峰系统及控制方法。
技术介绍
火力发电厂热电联产机组火电灵活性改造具有多种技术路线和方案,均以降低机组调峰期间发电功率和保证供热负荷为目标。其中在加大机组供热抽汽能力方面采用的技术通常有旁路供热改造、汽机低压缸切除运行改造等,其中切缸改造投资较大,增加的对外供汽量有限(因机组在调峰工况下运行的低压缸流通量已经为满足安全运行的最小值),同时低压缸轴系及末级叶片的长期运行安全有待长期工程实践的验证;旁路供热改造可提供较大的对外供热汽量,但投资也较大,存在机组及旁路并列运行工况及旁路高压差、大温差的运行工况,运行调节复杂、运行工况恶劣,机组长期运行安全性也有待进一步长期工程实践的验证。
技术实现思路
本专利技术的目的是提供一种热电联产机组在调峰运行期间增加采暖供汽量,满足供热负荷需求,同时提高机组运行安全的深度调峰汽机系统及控制方法,以解决
技术介绍
存在的改造投资大,运行调节复杂,安全性不可靠的问题。为实现上述目的,本专利技术提供一种热电联产机组深度调峰汽机系统,包括汽轮机、高压加热器组,各高压加热器对应抽汽管道上设有抽汽管道逆止阀和抽汽管道关断阀,其特征在于:在汽轮机抽汽管道上各高压加热器入口侧分别设一电动关断门,在每一抽汽管道逆止阀及抽汽管道关断阀组和高压加热器入口电动关断门之间分别设置一抽汽引出管道,在抽汽引出管道上按蒸汽流向先后设置电动关断门及减温减压器,各高压加热 ...
【技术保护点】
1.一种热电联产机组深度调峰汽机系统,包括汽轮机、高压加热器组,各高压加热器对应抽汽管道上设有抽汽管道逆止阀和抽汽管道关断阀,其特征在于:在汽轮机抽汽管道上各高压加热器入口侧分别设一电动关断门,在每一抽汽管道逆止阀及抽汽管道关断阀组和高压加热器入口电动关断门之间分别设置一抽汽引出管道,在抽汽引出管道上按蒸汽流向先后设置电动关断门及减温减压器,各高压加热器抽汽引出管道末端汇集到采暖抽汽支母管,采暖抽汽支母管汇入采暖抽汽母管供至热网加热系统。
【技术特征摘要】
1.一种热电联产机组深度调峰汽机系统,包括汽轮机、高压加热器组,各高压加热器对应抽汽管道上设有抽汽管道逆止阀和抽汽管道关断阀,其特征在于:在汽轮机抽汽管道上各高压加热器入口侧分别设一电动关断门,在每一抽汽管道逆止阀及抽汽管道关断阀组和高压加热器入口电动关断门之间分别设置一抽汽引出管道,在抽汽引出管道上按蒸汽流向先后设置电动关断门及减温减压器,各高压加热器抽汽引出管道末端汇集到采暖抽汽支母管,采暖抽汽支母管汇入采暖抽汽母管供至热网加热系统。2.一种热电联产机组深度调峰汽机系统的...
【专利技术属性】
技术研发人员:王钟,郭晓克,张丹,丛东升,孙丰,
申请(专利权)人:中国电力工程顾问集团东北电力设计院有限公司,
类型:发明
国别省市:吉林,22
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