CN216518188U - Boiler start-up phase steam utilizes system - Google Patents

Boiler start-up phase steam utilizes system Download PDF

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CN216518188U
CN216518188U CN202122720447.4U CN202122720447U CN216518188U CN 216518188 U CN216518188 U CN 216518188U CN 202122720447 U CN202122720447 U CN 202122720447U CN 216518188 U CN216518188 U CN 216518188U
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steam
boiler
main pipe
bypass
unit
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庄猛
朱士超
郑建坡
孙金
崔建国
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Binzhou Beihai Xinhe New Material Co ltd
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Binzhou Beihai Xinhe New Material Co ltd
Shandong Hongqiao New Material Co Ltd
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Abstract

本实用新型要解决的技术问题是提供一种锅炉启动阶段蒸汽利用系统,减少500℃以下蒸汽的外排,缩短启动时间,达到节能减排效果,其包括锅炉机组和汽轮发电机组,所述锅炉机组的蒸汽出口连通所述汽轮发电机组,其特征在于,还包括锅炉启动旁路母管,所述锅炉机组的蒸汽出口通过旁路管道连通所述锅炉启动旁路母管;所述锅炉启动旁路母管的末端连通供汽母管,所述供汽母管用于给蒸汽用户端供汽。

Figure 202122720447

The technical problem to be solved by the utility model is to provide a steam utilization system in the start-up stage of the boiler, which can reduce the discharge of steam below 500°C, shorten the start-up time, and achieve the effect of energy saving and emission reduction, which includes a boiler unit and a steam turbine generator unit. The steam outlet of the boiler unit is connected to the steam turbine generator unit, and it is characterized in that it further includes a boiler startup bypass main pipe, and the steam outlet of the boiler group is connected to the boiler startup bypass main pipe through a bypass pipe; the boiler startup bypass main pipe; The end of the startup bypass main pipe is connected to the steam supply main pipe, and the steam supply main pipe is used for supplying steam to the steam user end.

Figure 202122720447

Description

一种锅炉启动阶段蒸汽利用系统A steam utilization system in the start-up stage of a boiler

技术领域technical field

本实用新型锅炉节能减排技术改造领域,具体涉及一种锅炉启动阶段蒸汽利用系统。The utility model relates to the technical transformation field of boiler energy saving and emission reduction, in particular to a steam utilization system in the start-up stage of a boiler.

背景技术Background technique

锅炉机组的蒸汽出口连通汽轮发电机组,锅炉机组产生500℃的蒸汽进入汽轮发电机组,汽轮发电机组开始运行进行发电,蒸汽经过汽轮发电机后从500℃降低到300℃,300℃的蒸汽直接并入供汽母管用于给蒸汽用户端供汽。The steam outlet of the boiler unit is connected to the steam turbine generator unit. The steam generated by the boiler unit at 500°C enters the steam turbine generator unit. The steam turbine generator unit starts to operate to generate electricity. The steam is directly merged into the steam supply main pipe for supplying steam to the steam user end.

锅炉机组是由多个锅炉机并联而成,锅炉机启动需要大量的油、煤、电等能源,蒸汽需要达到500℃以上才能供给汽轮发电机组进行使用。然而锅炉机启动过程中,产生的蒸汽并不是立马达到500℃,而是蒸汽温度在300℃~400℃之间,这温度范围的蒸汽不能直接进入汽轮发电机,而且必须排出锅炉外,否则引起锅炉超温超压。因此,最常规的方式是在锅炉机组上设置外排管,将未达到500℃的蒸汽直接外排到大气中。当锅炉内产生的蒸汽达到500℃后,会关闭外排管,然后开始给汽轮发电机进行供汽。The boiler unit is composed of multiple boiler units in parallel. The startup of the boiler unit requires a large amount of energy such as oil, coal, and electricity, and the steam needs to reach above 500 ℃ before it can be supplied to the steam turbine generator unit for use. However, during the startup process of the boiler, the steam generated does not reach 500°C immediately, but the steam temperature is between 300°C and 400°C. The steam in this temperature range cannot directly enter the turbine generator, and must be discharged out of the boiler, otherwise Cause the boiler to overheat and overpressure. Therefore, the most common way is to set an external exhaust pipe on the boiler unit to directly discharge the steam that does not reach 500 °C into the atmosphere. When the steam generated in the boiler reaches 500 °C, the outer exhaust pipe will be closed, and then the steam will be supplied to the turbo-generator.

在实践中经过统计,锅炉启动时间为4小时左右,在这个锅炉启动操作过程中,不但大量消耗燃料,而且整个过程中蒸汽外排浪费,造成大量能源浪费。According to statistics in practice, the start-up time of the boiler is about 4 hours. During the start-up operation of the boiler, not only a large amount of fuel is consumed, but also the steam is wasted in the whole process, resulting in a large amount of energy waste.

实用新型内容Utility model content

本实用新型要解决的技术问题是提供一种锅炉启动阶段蒸汽利用系统,减少500℃以下蒸汽的外排,缩短启动时间,达到节能减排效果。The technical problem to be solved by the utility model is to provide a steam utilization system in the start-up stage of the boiler, which can reduce the discharge of steam below 500°C, shorten the start-up time, and achieve the effect of energy saving and emission reduction.

本实用新型是通过以下技术方案实现的:The utility model is achieved through the following technical solutions:

一种锅炉启动阶段蒸汽利用系统,包括锅炉机组和汽轮发电机组,所述锅炉机组的蒸汽出口连通所述汽轮发电机组,其特征在于,还包括锅炉启动旁路母管,所述锅炉机组的蒸汽出口通过旁路管道连通所述锅炉启动旁路母管;A boiler start-up stage steam utilization system, comprising a boiler unit and a steam turbine generator unit, the steam outlet of the boiler unit is connected to the steam turbine generator unit, and it is characterized in that it also includes a boiler start-up bypass main pipe, the boiler unit The steam outlet of the boiler is connected to the boiler startup bypass main pipe through a bypass pipe;

所述锅炉启动旁路母管的末端连通供汽母管,所述供汽母管用于给蒸汽用户端供汽。The end of the boiler startup bypass main pipe is connected to the steam supply main pipe, and the steam supply main pipe is used for supplying steam to the steam user end.

进一步的,所述锅炉启动旁路母管和供汽母管之间设有减温减压器。Further, a desuperheater and pressure reducer is arranged between the boiler startup bypass main pipe and the steam supply main pipe.

进一步的,所述旁路管道上设有锅炉启动旁路电动阀门。Further, the bypass pipeline is provided with a boiler startup bypass electric valve.

进一步的,所述锅炉启动旁路电动阀门的开启温度范围为300℃~500℃。Further, the opening temperature range of the boiler startup bypass electric valve is 300°C to 500°C.

进一步的,所述锅炉机组包括4-6个锅炉机。Further, the boiler unit includes 4-6 boiler units.

本实用新型所述锅炉启动阶段蒸汽利用系统工作原理如下:The working principle of the steam utilization system at the start-up stage of the boiler described in the utility model is as follows:

锅炉机组点火开始启动,产生的蒸汽未达到500℃时,锅炉机组的外排管开启往外排汽,当蒸汽达到300℃时,锅炉机组开启锅炉启动旁路母管,蒸汽通过锅炉启动旁路母管进入供汽母管,最终给蒸汽用户端供汽。The boiler unit starts to ignite and starts, and when the generated steam does not reach 500 °C, the outer exhaust pipe of the boiler unit is opened to discharge steam to the outside. When the steam reaches 300 °C, the boiler unit opens the boiler to start the bypass bus, and the steam passes through the boiler to start the bypass bus. The pipe enters the steam supply main pipe, and finally supplies steam to the steam user end.

本实用新型与现有技术相比所取得的有益效果如下:Compared with the prior art, the beneficial effects obtained by the present utility model are as follows:

1、通过锅炉启动旁路母管将一部分未达到500℃的蒸汽转移给蒸汽用户端,从而加大蒸汽的排放速度,使锅炉机组产生的蒸汽快速达到500℃,缩短锅炉机组的启动时间,本实用新型能将锅炉机组启动时间控制到2.5小时左右,与以往启动时间相比,缩短了1个多小时,大大节约了锅炉启动的用油、用煤、用电量;1. Part of the steam that does not reach 500°C is transferred to the steam user end through the boiler startup bypass main pipe, so as to increase the steam discharge rate, so that the steam generated by the boiler unit can quickly reach 500°C and shorten the start-up time of the boiler unit. The utility model can control the start-up time of the boiler unit to about 2.5 hours, which is shortened by more than 1 hour compared with the previous start-up time, and greatly saves the oil, coal and electricity consumption for the boiler start-up;

且锅炉启动旁路母管内的蒸汽直接给给蒸汽用户端,避免蒸汽全部外排到大气中,充分利用蒸汽,大大降低了能源损失,达到节能减排效果;In addition, the steam in the boiler startup bypass main pipe is directly supplied to the steam user end, preventing all the steam from being discharged into the atmosphere, making full use of the steam, greatly reducing the energy loss, and achieving the effect of energy saving and emission reduction;

2、在锅炉启动旁路母管和供汽母管之间设有减温减压器,若锅炉启动旁路母管内蒸汽超过300℃,经过减温减压器能够控制到300℃,从而满足蒸汽用户端使用;2. There is a desuperheater and pressure reducer between the boiler start-up bypass main pipe and the steam supply main pipe. If the steam in the boiler start-up bypass main pipe exceeds 300°C, it can be controlled to 300°C through the desuperheater and pressure reducer, so as to meet the Steam client use;

3、本实用新型结构简单、维修方便,符合锅炉节能减排理念。3. The utility model has the advantages of simple structure and convenient maintenance, and conforms to the concept of energy saving and emission reduction of boilers.

附图说明Description of drawings

图1为本实用新型所述锅炉启动阶段蒸汽利用系统结构示意图;Fig. 1 is the structural schematic diagram of the steam utilization system in the boiler start-up stage of the utility model;

图2为其中一个锅炉机结构示意图;Figure 2 is a schematic structural diagram of one of the boiler machines;

图中: 1、锅炉机组,2、汽轮发电机组,3、减温减压器,4、锅炉启动旁路母管,5、锅炉截汽阀门,6、锅炉启动旁路电动阀门,7、减温减压站进汽阀门,8、减温减压站出汽阀门,9、供汽母管。In the picture: 1. Boiler unit, 2. Turbine generator unit, 3. Desuperheater and pressure reducer, 4. Boiler startup bypass main pipe, 5. Boiler steam shut-off valve, 6. Boiler startup bypass electric valve, 7. The inlet steam valve of the desuperheating and decompression station, 8. the steam outlet valve of the desuperheating and decompression station, 9. the steam supply main pipe.

具体实施方式Detailed ways

下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

如图1-2所示,本实施例公开一种锅炉启动阶段蒸汽利用系统,其主要包括锅炉机组1、汽轮发电机组2、减温减压器3、锅炉启动旁路母管4。在本实施例中,锅炉机组1是由四个锅炉机并联组成,每个锅炉机的蒸汽出口通过供汽管连通汽轮发电机组2,并在供汽管上设置有锅炉截汽阀门5。每个锅炉机的蒸汽出口通过旁路管道连接锅炉启动旁路母管4,旁路管道上设置有锅炉启动旁路电动阀门6,锅炉截汽阀门5和锅炉启动旁路电动阀门6均有电控系统控制开启和关闭。As shown in FIGS. 1-2 , the present embodiment discloses a steam utilization system in the start-up phase of a boiler, which mainly includes a boiler unit 1 , a steam turbine generator unit 2 , a desuperheater and pressure reducer 3 , and a boiler start-up bypass main pipe 4 . In this embodiment, the boiler unit 1 is composed of four boiler units in parallel. The steam outlet of each boiler unit is connected to the steam turbine generator unit 2 through a steam supply pipe, and a boiler steam shut-off valve 5 is arranged on the steam supply pipe. The steam outlet of each boiler machine is connected to the boiler start-up bypass main pipe 4 through a bypass pipe, and a boiler start-up bypass electric valve 6 is arranged on the bypass pipe. The boiler steam cut-off valve 5 and the boiler start-up bypass electric valve 6 have electric power The control system controls opening and closing.

减温减压器3用于给蒸汽减温减压的装置,其功能是将高温高压蒸汽降为用户能够使用的低压低温蒸汽(可为过热蒸汽)。在本实施例中,减温减压器3的进汽端设有减温减压站进汽阀门7,减温减压器3的出汽端设有减温减压站出汽阀门8,锅炉启动旁路母管4的末端连通减温减压站进汽阀门7,减温减压站出汽阀门8连通供汽母管9,供汽母管9用于给蒸汽用户端供汽。The desuperheating and pressure reducing device 3 is a device for reducing the temperature and pressure of the steam, and its function is to reduce the high-temperature and high-pressure steam to the low-pressure and low-temperature steam (which can be superheated steam) that can be used by the user. In the present embodiment, the inlet end of the desuperheating and pressure reducing device 3 is provided with a steam inlet valve 7 of the desuperheating and decompression station, and the steam outlet end of the desuperheating and decompressing device 3 is provided with a steam outlet valve 8 of the desuperheating and decompression station. The end of the boiler startup bypass main pipe 4 is connected to the steam inlet valve 7 of the desuperheating and decompression station, and the steam outlet valve 8 of the desuperheating and decompression station is connected to the steam supply main pipe 9, which is used to supply steam to the steam user end.

本实用新型所述锅炉启动阶段蒸汽利用系统工作过程如下:The working process of the steam utilization system in the boiler startup phase of the utility model is as follows:

锅炉机组1点火开始启动,当开始产生蒸汽,且产生的蒸汽未达到500℃,锅炉截汽阀门5处于关闭状态,锅炉机组1不为汽轮发电机组2供汽,此时,锅炉机组1的外排管开启往外排汽(图中省略该结构),当蒸汽达到300℃时,锅炉机组1的旁路管道上的锅炉启动旁路电动阀门6开启,锅炉机组1产生的一部分蒸汽进入锅炉启动旁路母管4内,蒸汽经过减温减压器3处理成300℃的蒸汽后进入供汽母管9,最终给蒸汽用户端供汽。当锅炉机组1产生的蒸汽达到500℃时,排气管和锅炉启动旁路电动阀门6均关闭,锅炉截汽阀门5处于开启状态,锅炉机组1为汽轮发电机组2供汽。Boiler unit 1 starts to ignite and starts. When steam starts to be generated, and the generated steam does not reach 500 °C, the boiler steam cut-off valve 5 is closed, and the boiler unit 1 does not supply steam for the turbo-generator unit 2. At this time, the boiler unit 1 The outer exhaust pipe is opened to exhaust steam to the outside (the structure is omitted in the figure). When the steam reaches 300 °C, the boiler start-up bypass electric valve 6 on the bypass pipe of the boiler unit 1 is opened, and a part of the steam generated by the boiler unit 1 enters the boiler to start. In the bypass main pipe 4, the steam is processed into steam at 300°C by the desuperheater and pressure reducer 3, and then enters the steam supply main pipe 9, and finally supplies steam to the steam user end. When the steam generated by the boiler unit 1 reaches 500°C, the exhaust pipe and the electric valve 6 of the boiler start-up bypass are closed, the boiler steam cut-off valve 5 is in the open state, and the boiler unit 1 supplies steam for the turbo-generator unit 2.

本实用新型通过锅炉启动旁路母管将一部分未达到500℃的蒸汽转移给蒸汽用户端,从而加大蒸汽的排放速度,使锅炉机组产生的蒸汽快速达到500℃,缩短锅炉机组的启动时间,与以往启动时间(4小时)相比,缩短了1个多小时,大大节约了锅炉启动的用油、用煤、用电量;且充分利用蒸汽,大大降低了能源损失,达到节能减排效果。The utility model transfers a part of the steam that does not reach 500°C to the steam user end through the boiler startup bypass main pipe, thereby increasing the steam discharge speed, making the steam generated by the boiler unit reach 500°C quickly, and shortening the start-up time of the boiler unit. Compared with the previous start-up time (4 hours), it is shortened by more than 1 hour, which greatly saves the oil, coal and electricity consumption for boiler startup; and makes full use of steam, which greatly reduces energy loss and achieves the effect of energy saving and emission reduction .

Claims (3)

1. A steam utilization system at a boiler starting stage comprises a boiler unit and a steam turbine generator unit, wherein a steam outlet steam supply pipe of the boiler unit is communicated with the steam turbine generator unit;
the tail end of the boiler starting bypass main pipe is communicated with a steam supply main pipe, and the steam supply main pipe is used for supplying steam to a steam user side;
and a temperature and pressure reducer is arranged between the boiler starting bypass main pipe and the steam supply main pipe, and a boiler starting bypass electric valve is arranged on the bypass pipeline.
2. The steam utilization system in the boiler start-up phase according to claim 1, wherein the start-up temperature of the electric valve of the boiler start-up bypass is in a range of 300 ℃ to 500 ℃.
3. A boiler start-up phase steam utilization system according to any one of claims 1-2, characterized in that the boiler plant comprises 4-6 boiler machines.
CN202122720447.4U 2021-11-09 2021-11-09 Boiler start-up phase steam utilizes system Active CN216518188U (en)

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