CN208146590U - The blowpipe temporary system of three discard heat boilers - Google Patents

The blowpipe temporary system of three discard heat boilers Download PDF

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Publication number
CN208146590U
CN208146590U CN201820317228.7U CN201820317228U CN208146590U CN 208146590 U CN208146590 U CN 208146590U CN 201820317228 U CN201820317228 U CN 201820317228U CN 208146590 U CN208146590 U CN 208146590U
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China
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pipeline
blowpipe
pressure superheater
pressure
interim
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CN201820317228.7U
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张昕
周江博
赵熙
马乐乐
谢宁
时道斌
程亮
张清峰
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
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Abstract

The utility model provides a kind of blowpipe temporary system of three discard heat boilers, which includes:The interim pipeline of high pressure blowpipe, is connected to high-pressure superheater system pipeline, the purging for high-pressure superheater system;The interim pipeline of middle pressure blowpipe is connected to middle pressure superheater system pipeline, the purging for middle pressure superheater system;The interim pipeline of injector torch, is connected to low-pressure superheater system pipeline, the purging for low-pressure superheater system;With the gland steam exhauster of the interim pipeline of high pressure blowpipe, middle pressure blowpipe interim pipeline and the interim pipeline connection of injector torch;Switching device, for after to high-pressure superheater system, middle pressure superheater system and low-pressure superheater system purge, the steam that high-pressure superheater generates to be added in reheater system;The steam added in reheater system, which is used for, purges reheater system together with the steam that middle pressure superheater generates.Above-mentioned technical proposal improves the blowpipe efficiency of three discard heat boilers, has saved blowpipe time and cost.

Description

The blowpipe temporary system of three discard heat boilers
Technical field
The utility model relates to gas power station technical field, in particular to a kind of blowpipe of three discard heat boilers is temporarily System.
Background technique
The purpose of waste heat boiler blowpipe is to be deposited in superheater to remove in manufacture, transport, keeping and installation process Various sundries in system and reheater system and jet chimney, such as:Sand grains, stone, rotation bits and iron scale etc., prevent machine The damage of the booster and steam turbine flow passage component of superheater and reheater, improves the safety and economy of unit, and change in group operation Steam quality during kind operation.The purging of waste-heat boiler superheater, reheater and its steam pipe system is that new-built unit is thrown Important procedure before fortune.
Currently, the blowpipe temporary system that three discard heat boiler of " two drag one " unit uses has the following disadvantages:
1) since two waste heat boiler high, medium and low voltage systems individually purge, blowpipe temporary system tubing dosage compared with Greatly, electrically operated gate dosage is larger, and blowpipe temporary system is longer and difficult arrangement, and increases system recovery time;
2) after senior middle school's low pressure system purge is clean, when being transferred to purging reheater system, blowing out is needed, to blowpipe temporary system It switches over, the time required to increasing blowpipe, wastes a large amount of fuel and demineralized water.
Utility model content
The utility model embodiment provides a kind of blowpipe temporary system of three discard heat boilers, to improve three discards heat The blowpipe efficiency of boiler, saves the blowpipe time and cost, the system include:
The interim pipeline of high pressure blowpipe, is connected to high-pressure superheater system pipeline, the purging for high-pressure superheater system;
The interim pipeline of middle pressure blowpipe is connected to middle pressure superheater system pipeline, the purging for middle pressure superheater system;
The interim pipeline of injector torch, is connected to low-pressure superheater system pipeline, the purging for low-pressure superheater system;
With the gland steam exhauster of the interim pipeline of high pressure blowpipe, middle pressure blowpipe interim pipeline and the interim pipeline connection of injector torch;
Switching device is connected to, for pressing through to height with the high-pressure superheater system pipeline and reheater system pipeline After hot device system, middle pressure superheater system and low-pressure superheater system purge, the steam that high-pressure superheater is generated is supplemented Into reheater system;The steam added in reheater system, which is used for, purges reheating together with the steam that middle pressure superheater generates Device system.
Technical solution provided by the embodiment of the utility model is when being not necessarily to recovery system, while to high-pressure superheater system System, middle pressure superheater system and low-pressure superheater system either simultaneously or alternately purge, and blowpipe temporary system pipeline is succinct.And right After high-pressure superheater system, middle pressure superheater system and low-pressure superheater system purge, when being transferred to purging reheater system, In the case where without blowing out, the steam that high-pressure superheater generates is added in reheater system by switching device;It adds to Steam in reheater system, which is used for, purges reheater system together with the steam that middle pressure superheater generates, realize can it is hot Line switching, improves the blowpipe efficiency of three discard heat boilers, has saved blowpipe time and cost.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The restriction to the utility model is not constituted.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the blowpipe temporary system of three discard heat boilers in the utility model embodiment;
Fig. 2 is the schematic illustration that blowpipe temporary system carries out first stage purging in the utility model embodiment;
Fig. 3 is the media flow schematic illustration purged in the utility model embodiment to high-pressure superheater system;
Fig. 4 is the media flow schematic illustration that centering pressure superheater system is purged in the utility model embodiment;
Fig. 5 is the media flow schematic illustration purged in the utility model embodiment to low-pressure superheater system;
Fig. 6 is the schematic illustration that blowpipe temporary system carries out second stage purging in the utility model embodiment;
Fig. 7 is the media flow schematic illustration purged in the utility model embodiment to reheater system;
Fig. 8 is the structural representation of the controller of the blowpipe temporary system of three discard heat boilers in the utility model embodiment Figure.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached Figure, is described in further details the utility model.Here, the exemplary embodiment and its explanation of the utility model are for solving The utility model is released, but is not intended to limit the scope of the present invention.
Since inventor has found the technical problems existing in the prior art, a kind of gas power station " two drag one " is proposed The blowpipe temporary system that three discard heat boiler of unit hot can switch online, the blowpipe temporary system is mainly by senior middle school's injector torch Interim electronic cut-off gate (high pressure face blow door, middle pressure face blow door and low pressure face blow door), it is high it is main to cold door interim again, it is cold interim again Door, target plate device (3), muffler, the interim closure plate of main inlet throttle-stop valve blowpipe, tee tube and several interim piping connections form.In high pressure Whether interim door, the interim door of middle pressure and the interim Men Jun of low pressure are respectively provided with target plate device, to examine the interim pipeline of blowpipe qualified. It is provided with muffler, on gland steam exhauster for reducing exhaust noise.Below to the blowpipe temporary system of the three discards heat boiler into Row is described in detail as follows.
Fig. 1 is the structural schematic diagram of the blowpipe temporary system of three discard heat boilers in the utility model embodiment, such as Fig. 1 institute Show, which includes:
The interim pipeline 1 of high pressure blowpipe, is connected to, the purging for high-pressure superheater system with high-pressure superheater system pipeline 4;
The middle interim pipeline 2 of pressure blowpipe, is connected to middle pressure superheater system pipeline 5, the purging for middle pressure superheater system;
The interim pipeline 3 of injector torch, is connected to, the purging for low-pressure superheater system with low-pressure superheater system pipeline 6;
The gland steam exhauster being connected to the interim pipeline 1 of high pressure blowpipe, the interim pipeline 2 of middle pressure blowpipe and the interim pipeline 3 of injector torch 7;
Switching device 8 is connected to the high-pressure superheater system pipeline 4 and reheater system pipeline 9, for high pressure After superheater system, middle pressure superheater system and low-pressure superheater system purge, the steam that high-pressure superheater is generated is mended It is charged in reheater system;The steam added in reheater system is used for be purged again together with the steam that middle pressure superheater generates Hot device system.
When it is implemented, three discard heat boiler steam-line blowing of " two drag one " unit is divided into two stages, wherein the first stage Respectively to high-pressure superheater system, middle pressure superheater system and low-pressure superheater system are purged.It is blown to above three system After sweeping completely, system switches into blowpipe second stage.Second stage purges reheater system, since inventor considers Reheater steam blow parameters are not achieved in the steam momentum generated to middle pressure superheater, so inventor considers to utilize high-pressure superheater The steam of generation is supplemented, to improve the efficiency of blowpipe.
Since inventor considers this technical problem, the scheme of the utility model embodiment is proposed:It is being not necessarily to restorer In the case of system, while high-pressure superheater system, middle pressure superheater system and low-pressure superheater system are either simultaneously or alternately purged, is blown It is succinct to manage interim pipeline.And it is finished to high-pressure superheater system, middle pressure superheater system and low-pressure superheater system purge Afterwards, when being transferred to purging reheater system, without being mended by the steam that switching device generates high-pressure superheater in the case where blowing out It is charged in reheater system;The steam added in reheater system is used for be purged again together with the steam that middle pressure superheater generates Hot device system, realize can hot online switching, improve the blowpipe efficiency of three discard heat boilers, saved the blowpipe time and at This.
Bold portion is expressed as the formal system of unit in Fig. 1, and dotted portion is expressed as blowpipe temporary system.It is interim in blowpipe High master is installed in system additional to cold door interim again and cold door interim again, as used in system switching.Pass through opening for above-mentioned two valve Closing can be achieved, which can carry out the switching of first stage and second stage in the non-stop-machine situation of unit, Reduce blowpipe cycle time, to largely save the consumption of fuel and demineralized water.Below to the specific structure of switching device It is introduced as follows.
In one embodiment, the switching device 8 may include:
The first end of first tee tube 81, the first tee tube is connected to high-pressure superheater system pipeline 4, the first tee tube Second end is connected to gland steam exhauster 7;
Switch pipeline 82, the first end for switching pipeline is connected to the third end of first tee tube 81;
The first end of second tee tube 83, the second tee tube is connected to the input terminal of reheater system pipeline 9, the second threeway The second end of pipe is connected to the second end of the switching pipeline 82;
Height is main to cold door 84 interim again, is arranged on the switching pipeline 82, for high-pressure superheater system, middle pressure It is opened after superheater system and low-pressure superheater system purge;
Third tee tube 85, the first end of third tee tube are connected to the third end of second tee tube 83, and the three or three The second end of siphunculus is connected to gland steam exhauster 7, and the third end of third tee tube is connected to the output end of reheater system pipeline 9;
Cold door 86 interim again, is arranged on the pipeline that the second tee tube 83 is connected to third tee tube 85, for purging It is closed when reheater system.
In one embodiment, blowpipe temporary system further includes:High pressure, which is faced, blows door 11, and setting is in the first tee tube 81 and row On the pipeline that steam pipe 7 is connected to, for the unlatching when being purged to high-pressure superheater system, purged to reheater system When close.
When it is implemented, the high main on-off for being used to control switching pipeline 82 to cold door 84 interim again.To high-pressure superheater When system is purged, height master is to close to cold door 84 interim again;To high-pressure superheater system, middle pressure superheater system and After low-pressure superheater system purge, when the steam for generating high-pressure superheater being needed to add to reheater system, open high Master is to cold door 84 interim again, and closing high pressure, which is faced, blows door 11 and cold door 86 interim again, and the steam that high-pressure superheater generates adds to again In hot device system, the steam added in reheater system, which is used for, purges reheater system together with the steam that middle pressure superheater generates System.Specifically, include at this moment two-way steam to the steam of reheater system purge, may refer to attached drawing 7 and its explanatory note.
In one embodiment, blowpipe temporary system further includes:First target plate device 12, setting is in the first tee tube 81 and row On the pipeline that steam pipe 7 is connected to, for examining the interim pipeline 1 of high pressure blowpipe.
In one embodiment, blowpipe temporary system further includes:Middle pressure, which is faced, blows door 21, and setting is in third tee tube 85 and row On the pipeline that steam pipe 7 is connected to, for the unlatching when being purged to middle pressure superheater system and reheater system.
In one embodiment, blowpipe temporary system further includes:Second target plate device 22, setting is in third tee tube 85 and row On the pipeline that steam pipe 7 is connected to, for pressing the interim pipeline 2 of blowpipe in examining.
In one embodiment, blowpipe temporary system further includes:Low pressure, which is faced, blows door 31, is arranged in the interim pipeline of injector torch On, for being opened when purging low-pressure superheater system.
In one embodiment, blowpipe temporary system further includes:Third target plate device 32 is arranged in the interim pipeline of injector torch On, for examining the interim pipeline 3 of injector torch.
When it is implemented, high pressure face blow door 11, middle pressure faces and blows door 21 and low pressure faces the setting for blowing door 31, convenient for control blowpipe Which system temporary system specifically purges, flexibly, conveniently.
When it is implemented, the setting of the first target plate device 12, the second target plate device 22 and third target plate device 32, to examine blowpipe Whether interim pipeline is qualified, improves the safety of blowpipe temporary system.
In one embodiment, blowpipe temporary system further includes:Muffler 71 is arranged on the gland steam exhauster 7, for dropping Low exhaust noise.
When it is implemented, being provided with muffler 71, on gland steam exhauster for reducing exhaust noise.
2 to 7 introduce two stages that blowpipe temporary system works with reference to the accompanying drawing.
(1) first stage blowpipe process is as shown in Figure 2:It closes high main to cold door 84 interim again, high-pressure system and middle pressure system System isolation;#1 reheated steam valve is closed, reheat system is completely cut off;It is cold again that outlet valve, #1 are crossed in the main vapour electrically operated gate of unlatching #1 high pressure, #1 Senior middle school's low-pressure system is connected respectively for entrance electrically operated gate, cold door interim again, #1 low pressure main inlet throttle-stop valve.Then, high pressure is separately turned on to face Blow door, middle pressure face blow door, low pressure faces and blows door, alternately purging is carried out to senior middle school's low-pressure system respectively.In Fig. 2, arrow direction is When first stage purges, the flow direction of medium, specific process is as follows:
(1) firstly, in conjunction with Fig. 3 introduction to the purge of high-pressure superheater system, i.e. high-pressure superheater system and high pressure Main steam line purging:When being purged to high-pressure system pipeline, opens the main vapour electrically operated gate of high pressure and high pressure faces and blows door, it will be high Pressure superheater system is connected with the interim pipeline of high pressure blowpipe, enters pipeline using the steam that high-pressure superheater generates, presses through to height Hot device system is purged.
(2) secondly, introducing the purge of centering pressure superheater system in conjunction with Fig. 4:When centering pressure system pipeline is blown Mistake outlet valve, the cold reentrancy electrically operated gate of #1, cold door interim again and middle pressure, which are faced, when sweeping, in opening #1 blows door, presses superheater in utilization Steam enters pipeline, and centering pressure superheater system is purged.
(3) finally, in conjunction with Fig. 5 introduction to the purge of low-pressure superheater system, i.e. low-pressure superheater, low pressure main steam Pipeline purging:When being purged to low-pressure system pipeline, open the interim door of low pressure, using low-pressure superheater generate steam into Enter pipeline to purge low-pressure superheater system.
When it is implemented, being asked to the process for pressing superheater and #2 low-pressure superheater to be purged in #2 high-pressure superheater, #2 Referring to above-mentioned to the purging for pressing superheater and #1 low-pressure superheater in #1 high-pressure superheater, #1.
After first stage blowpipe, combustion engine load is down to airport logistic park and is not shut down, waste heat boiler pressure carries out after stablizing Blowpipe temporary system switching, into blowpipe second stage.
(2) purging of second stage is described below:As shown in fig. 6, first #1 reheater steam valve is opened, then slowly High master is opened to cold door interim again, after high, medium voltage network conducting, at this point, since high-pressure system exhaust outlet back pressure is smaller, greatly The steam of amount is faced by high pressure blows a discharge, and reheater is not with tolerance to be passed through.So progressively close off high pressure face blow door and it is cold again Interim door, other valves are without operation.After completing above step, the switching of blowpipe temporary system is finished, and carries out second stage pair The purging of reheater.Again in blowing pipeline, media flow signal is as shown in Figure 7 for reheater, cold pipeline again, heat.
Conceived based on same utility model, a kind of blowpipe of three discard heat boilers is additionally provided in the utility model embodiment The controller of temporary system, such as the following examples.Since the controller solution of the blowpipe temporary system of three discard heat boilers is asked The principle of topic is similar to the blowpipe temporary system of three discard heat boilers, therefore the control of the blowpipe temporary system of three discard heat boilers The implementation of device may refer to the implementation of the blowpipe temporary system of three discard heat boilers, and overlaps will not be repeated.It is following to be used , the combination of the software and/or hardware of predetermined function may be implemented in term " unit " or " module ".Although following embodiment institute The device of description preferably realized with software, but the combined realization of hardware or software and hardware be also may and quilt Conception.
Fig. 8 is the structural representation of the controller of the blowpipe temporary system of three discard heat boilers in the utility model embodiment Figure, as shown in figure 8, the controller includes:
First control unit 101 is connected for controlling high-pressure superheater system pipeline with the interim pipeline of high pressure blowpipe, to height Pressure superheater system is purged;It presses superheater system pipeline to be connected with the interim pipeline of middle pressure blowpipe in control, heat is pressed through in Device system is purged;Control low-pressure superheater system pipeline is connected with the interim pipeline of injector torch, to low-pressure superheater system It is purged;
Second control unit 102, for high-pressure superheater system, middle pressure superheater system and low-pressure superheater system After purging, control switching device adds to the steam that high-pressure superheater generates in reheater system;Add to reheater Steam in system, which is used for, purges reheater system together with the steam that middle pressure superheater generates.
In one embodiment, the first control unit is specifically used for setting on control unlatching high-pressure superheater system pipeline The high pressure being arranged in the main vapour electrically operated gate of the high pressure set and the interim pipeline of high pressure blowpipe, which is faced, blows door, to high-pressure superheater system into Row purging;Control presses the middle outlet valve excessively being arranged on superheater system pipeline and cold reentrancy electrically operated gate and middle pressure in opening The cold door interim again and middle pressure being arranged on the interim pipeline of blowpipe, which face, blows door, and centering pressure superheater system is purged;Control is opened The low pressure being arranged on the interim pipeline of low pressure main inlet throttle-stop valve and injector torch being arranged on low-pressure superheater system pipeline, which is faced, blows door, Low-pressure superheater system is purged.
In one embodiment, second control unit is specifically used for high-pressure superheater system, middle pressure superheater After system and low-pressure superheater system purge, control combustion engine load is down to airport logistic park, after waste heat boiler pressure is stablized, successively The steam valve that is arranged and high main to cold door interim again is opened on reheater system pipeline in control, and control, which is closed high pressure and faced, blows door and cold Interim door again adds to the steam that high-pressure superheater generates in reheater system;The steam added in reheater system is used The steam that Yu Yuzhong pressure superheater generates purges reheater system together.
The utility model embodiment provide technical solution advantageous effects be:
(1) blowpipe temporary system is designed for Gas Generator Set waste heat boiler blowpipe, and system pipeline is succinct, and consumptive material is less, blows It sweeps that range is comprehensive, reduces the range of manual cleaning, while improving blowpipe effect, ensure that the safety run after unit And economy.
(2) the blowpipe temporary system can carry out cutting for first stage and second stage in the non-stop-machine situation of unit It changes, reduces blowpipe cycle time, to largely save the consuming cost of fuel and demineralized water.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, the utility model embodiment can have various modifications and variations.All spirit in the utility model Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this utility model.

Claims (9)

1. a kind of blowpipe temporary system of three discard heat boilers, which is characterized in that including:
The interim pipeline of high pressure blowpipe, is connected to high-pressure superheater system pipeline, the purging for high-pressure superheater system;
The interim pipeline of middle pressure blowpipe is connected to middle pressure superheater system pipeline, the purging for middle pressure superheater system;
The interim pipeline of injector torch, is connected to low-pressure superheater system pipeline, the purging for low-pressure superheater system;
With the gland steam exhauster of the interim pipeline of high pressure blowpipe, middle pressure blowpipe interim pipeline and the interim pipeline connection of injector torch;
Switching device is connected to the high-pressure superheater system pipeline and reheater system pipeline, for high-pressure superheater After system, middle pressure superheater system and low-pressure superheater system purge, the steam that high-pressure superheater generates is added to again In hot device system;The steam added in reheater system, which is used for, purges reheater system together with the steam that middle pressure superheater generates System.
2. the blowpipe temporary system of three discards heat boiler as described in claim 1, which is characterized in that the switching device packet It includes:
The first end of first tee tube, the first tee tube is connected to high-pressure superheater system pipeline, the second end of the first tee tube It is connected to gland steam exhauster;
Switch pipeline, the first end for switching pipeline is connected to the third end of first tee tube;
The first end of second tee tube, the second tee tube is connected to the input terminal of reheater system pipeline, and the of the second tee tube Two ends are connected to the second end of the switching pipeline;
Height is main to cold door interim again, is arranged on the switching pipeline, for high-pressure superheater system, middle pressure superheater system It is opened after system and low-pressure superheater system purge;
Third tee tube, the first end of third tee tube are connected to the third end of second tee tube, and the of third tee tube Two ends are connected to gland steam exhauster, and the third end of third tee tube is connected to the output end of reheater system pipeline;
Cold door interim again, is arranged on the pipeline that the second tee tube is connected to third tee tube, in purging reheater system When close.
3. the blowpipe temporary system of three discards heat boiler as claimed in claim 2, which is characterized in that further include:
High pressure, which is faced, blows door, is arranged on the pipeline that the first tee tube is connected to gland steam exhauster, for high-pressure superheater system into It is opened when row purging, the closing when being purged to reheater system.
4. the blowpipe temporary system of three discards heat boiler as claimed in claim 2, which is characterized in that further include:
First target plate device is arranged on the pipeline that the first tee tube is connected to gland steam exhauster, for examining the interim pipeline of high pressure blowpipe.
5. the blowpipe temporary system of three discards heat boiler as claimed in claim 2, which is characterized in that further include:
Middle pressure faces and blows door, is arranged on the pipeline that third tee tube be connected to gland steam exhauster, be used for middle pressure superheater system with Unlatching when reheater system is purged.
6. the blowpipe temporary system of three discards heat boiler as claimed in claim 2, which is characterized in that further include:
Second target plate device is arranged on the pipeline that third tee tube is connected to gland steam exhauster, for pressing the interim pipeline of blowpipe in examining.
7. the blowpipe temporary system of three discards heat boiler as described in claim 1, which is characterized in that further include:
Low pressure, which is faced, blows door, is arranged on the interim pipeline of injector torch, for opening when purging low-pressure superheater system.
8. the blowpipe temporary system of three discards heat boiler as described in claim 1, which is characterized in that further include:
Third target plate device is arranged on the interim pipeline of injector torch, for examining the interim pipeline of injector torch.
9. the blowpipe temporary system of three discards heat boiler as described in claim 1, which is characterized in that further include:
Muffler is arranged on the gland steam exhauster, for reducing exhaust noise.
CN201820317228.7U 2018-03-08 2018-03-08 The blowpipe temporary system of three discard heat boilers Active CN208146590U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108202056A (en) * 2018-03-08 2018-06-26 华北电力科学研究院有限责任公司 The blowpipe temporary system and control method of three discard heat boilers
CN112404051A (en) * 2020-09-21 2021-02-26 中石化宁波工程有限公司 Steam pipe network integrated purging system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108202056A (en) * 2018-03-08 2018-06-26 华北电力科学研究院有限责任公司 The blowpipe temporary system and control method of three discard heat boilers
CN112404051A (en) * 2020-09-21 2021-02-26 中石化宁波工程有限公司 Steam pipe network integrated purging system and method

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