CN208312515U - A kind of emergency heating system realized large-scale Thermal generation unit and shut down not blowing out - Google Patents

A kind of emergency heating system realized large-scale Thermal generation unit and shut down not blowing out Download PDF

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CN208312515U
CN208312515U CN201820824514.2U CN201820824514U CN208312515U CN 208312515 U CN208312515 U CN 208312515U CN 201820824514 U CN201820824514 U CN 201820824514U CN 208312515 U CN208312515 U CN 208312515U
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way
entrance
outlet
boiler
valve
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刘永林
余小兵
吕凯
王东晔
居文平
宁哲
宋文希
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Xian Xire Energy Saving Technology Co Ltd
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Xian Xire Energy Saving Technology Co Ltd
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Abstract

The utility model discloses a kind of emergency heating systems realized large-scale Thermal generation unit and shut down not blowing out; including heat exchangers for district heating, heat supply network drainage pump, oxygen-eliminating device, the first regulating valve, boiler, the second regulating valve, high pressure cylinder, high pressure bypass valve, auxiliary vapour header, low pressure (LP) cylinder, heat exchangers for district heating and intermediate pressure cylinder, which can continue to meet heat demand when steam turbine or generator break down in heat supply period and overhauled.

Description

A kind of emergency heating system realized large-scale Thermal generation unit and shut down not blowing out
Technical field
The utility model relates to a kind of emergency heating systems, and in particular to a kind of large-scale Thermal generation unit of realization is shut down not The emergency heating system of blowing out.
Background technique
Regulation in " large and medium-sized thermal power plant design specification " (GB50660-2011): cogeneration units are answered in design It takes into account two functions of power generation and heat supply and answers reliability of heat-supply system with higher during external heat supply.For heat-supply type steamer Machine, a suitable machine matches a furnace when a maximum steam boiler of capacity deactivates, if the external steam supply ability of remaining boiler cannot expire 100% process steam amount needed for sufficient heating power user continuous production, is led to 60%~75% (severe cold area capping) winter heating When the requirement of wind and the mount of using heat of living, other standby heat source should be configured by heat supply network.The equipment such as thermal power plant unit steam turbine, generator exist It is broken down when need to overhaul in heat supply period, it will cause heat supply not up to standard or the problems such as heat supply stopping, steam supply stop, influencing resident Heating impression causes enterprise's production loss, and social influence is big.
High and low pressure bypass matching pressure and temperature reducing heat supply process is that single reheat unit realizes shutdown not blowing out emergency heat supply After high and low bypath system matching pressure and temperature reducing of arbitrarily downgrading is adjusted, steam directly imports heating steam for unique channel, i.e. Boiler Steam Main pipe realizes that emergency shuts down not blowing out heat supply.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of large-scale coal fired power generation of realization The emergency heating system of compressor emergency shutdown not blowing out, the system can break down progress in steam turbine or generator in heat supply period Continue to meet heat demand when maintenance.
In order to achieve the above objectives, the emergency confession described in the utility model realized large-scale Thermal generation unit and shut down not blowing out Hot systems include heat exchangers for district heating, heat supply network drainage pump, oxygen-eliminating device, the first regulating valve, boiler, the second regulating valve, high pressure cylinder, high pressure Bypass valve, auxiliary vapour header, low pressure (LP) cylinder, heat exchangers for district heating and intermediate pressure cylinder;The heat release side outlet of heat exchangers for district heating is through heat supply network drainage pump After be divided into two-way, wherein being connected all the way with the entrance of oxygen-eliminating device, another way is connected with the entrance of the first regulating valve, oxygen-eliminating device Outlet be divided into two-way, wherein being connected all the way with the water inlet of boiler, another way is connected with the entrance of the second regulating valve, pot The main-steam outlet of furnace is divided into two-way, wherein be connected all the way with the entrance of high pressure cylinder, the outlet of another way and the second regulating valve It is connected by the entrance of pipeline and Guan Houyu high pressure bypass valve, the outlet of high pressure cylinder and the outlet of high pressure bypass valve pass through pipeline And it is divided into two-way after pipe, wherein being connected all the way with the entrance of auxiliary vapour header, another way is connected with the reheating side entrance of boiler, The hot side outlet again of boiler is divided into two-way, wherein be connected all the way with the entrance of intermediate pressure cylinder, another way and heat exchangers for district heating are put Hot side entrance is connected, and the outlet of intermediate pressure cylinder is divided into two-way, wherein be connected all the way with the entrance of low pressure (LP) cylinder, another way and heat supply network The heat release side entrance of heater is connected, and the outlet of the first regulating valve is connected with the heat release side entrance of heat exchangers for district heating, auxiliary vapour The outlet of header is connected with the entrance of oxygen-eliminating device.
Oxygen-eliminating device is divided into two-way after feed pump, wherein being connected all the way with the water inlet of boiler, another way is adjusted with second The entrance of section valve is connected.
The outlet of high pressure cylinder passes through pipeline with the outlet of high pressure bypass valve after check-valves and first manual isolating valve and manages After be divided into two-way, wherein be connected all the way with the reheating side entrance of boiler, another way is connected with the entrance of auxiliary vapour header.
The main-steam outlet of boiler is connected through the second manual isolation valve and the first motor-operated isolation valve with the entrance of high pressure cylinder.
The reheated steam outlet of boiler is connected through third manual isolation valve and the second motor-operated isolation valve with the entrance of intermediate pressure cylinder It is logical.
Heat release side entrance of the outlet of intermediate pressure cylinder through third motor-operated isolation valve and the 4th manual isolation valve and heat exchangers for district heating It is connected.
The reheated steam of the outlet of first regulating valve and boiler export after piping and pipe through the 4th motor-operated isolation valve and 5th manual modulation valve is connected with the heat release side entrance of heat exchangers for district heating.
The utility model has the following beneficial effects:
The emergency heating system described in the utility model for realizing that large-scale Thermal generation unit shuts down not blowing out is specifically being grasped When making, when steam turbine nonserviceables lower overhauled, steam turbine is closed, and the main steam of boiler subtracts through high pressure bypass valve It is entered in the hot side again of boiler after temperature decompression, then the hot side outlet again through boiler enters in heat exchangers for district heating again, with reality Present steam turbine or generator break down in heat supply period and continue to meet the purpose of heat demand when being overhauled, and improve unit The safety of emergency heat supply guarantees the normal deoxygenation of boiler water filling in addition, the water entered in boiler carries out deoxygenation through oxygen-eliminating device Operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model;
Wherein, 1 be heat exchangers for district heating, 2 be heat supply network drainage pump, 3 be oxygen-eliminating device, 4 be feed pump, vapour header, 6 are supplemented by 5 Boiler, 7 be high pressure cylinder, 8 be intermediate pressure cylinder, 9 be low pressure (LP) cylinder, K1 is the first regulating valve, K2 is the second regulating valve, K3 is high pressure turbine by Valve.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the emergency heating system described in the utility model realized large-scale Thermal generation unit and shut down not blowing out Including heat exchangers for district heating 1, heat supply network drainage pump 2, oxygen-eliminating device 3, the first regulating valve K1, boiler 6, the second regulating valve K2, high pressure cylinder 7, High pressure bypass valve K3, auxiliary vapour header 5, low pressure (LP) cylinder 9, heat exchangers for district heating 1 and intermediate pressure cylinder 8;The heat release side outlet of heat exchangers for district heating 1 passes through It is divided into two-way after heat supply network drainage pump 2, wherein being connected all the way with the entrance of oxygen-eliminating device 3, another way enters with the first regulating valve K1's Mouth is connected, and the outlet of oxygen-eliminating device 3 is divided into two-way, wherein being connected all the way with the water inlet of boiler 6, another way is adjusted with second The entrance of valve K2 is connected, and the main-steam outlet of boiler 6 is divided into two-way, wherein be connected all the way with the entrance of high pressure cylinder 7, it is another Road is connected with the outlet of the second regulating valve K2 by the entrance of pipeline and Guan Houyu high pressure bypass valve K3, the outlet of high pressure cylinder 7 Outlet with high pressure bypass valve K3 is by being divided into two-way after pipeline and pipe, wherein being connected all the way with the entrance of auxiliary vapour header 5, separately It is connected all the way with the reheating side entrance of boiler 6, the hot side outlet again of boiler 6 is divided into two-way, wherein entering all the way with intermediate pressure cylinder 8 Mouth is connected, and another way is connected with the heat release side entrance of heat exchangers for district heating 1, and the outlet of intermediate pressure cylinder 8 is divided into two-way, wherein all the way It is connected with the entrance of low pressure (LP) cylinder 9, another way is connected with the heat release side entrance of heat exchangers for district heating 1, and the first regulating valve K1's goes out Mouth is connected with the heat release side entrance of heat exchangers for district heating 1, and the outlet of auxiliary vapour header 5 is connected with the entrance of oxygen-eliminating device 3.
Oxygen-eliminating device 3 is divided into two-way after feed pump 4, wherein be connected all the way with the water inlet of boiler 6, another way and second The entrance of regulating valve K2 is connected;The outlet of high pressure cylinder 7 is after check-valves and first manual isolating valve with high pressure bypass valve K3's Outlet is by being divided into two-way after pipeline and pipe, wherein is connected all the way with the reheating side entrance of boiler 6, another way and auxiliary vapour join The entrance of case 5 is connected;The main-steam outlet of boiler 6 is through the second manual isolation valve and the first motor-operated isolation valve and high pressure cylinder 7 Entrance is connected;The reheated steam of boiler 6 exports the entrance through third manual isolation valve and the second motor-operated isolation valve and intermediate pressure cylinder 8 It is connected;Heat release side entrance of the outlet of intermediate pressure cylinder 8 through third motor-operated isolation valve and the 4th manual isolation valve and heat exchangers for district heating 1 It is connected;The outlet of first regulating valve K1 and the reheated steam of boiler 6 export after piping and pipe through the 4th motor-operated isolation valve And the 5th manual modulation valve be connected with the heat release side entrance of heat exchangers for district heating 1.
Not into vapour after halt turbines, the main steam of boiler 6 directly through high pressure bypass valve K3 pressure and temperature reducing to boiler 6 The steam pressure and temperature that hot side matches again, then again the hot side again through boiler 6 be heat exchangers for district heating 1 heat absorbing side heat supply, To meet the needs of external heat supply.
In addition, the heating steam in the utility model returns deoxygenation through heat supply network drainage pump 2 again after heat exchangers for district heating 1 is cooling Deoxygenation is carried out in device 3, the vapour source of oxygen-eliminating device 3 comes from auxiliary vapour header 5, assists the steam of header from cold section of reheater, thus real The deoxygenation function of water on existing boiler 6.
In addition, pot is isolated by manual isolation valve and motor-operated isolation valve in the utility model for the safety for guaranteeing steamer pusher side 6 steam of furnace enters all channels of high pressure cylinder 7, intermediate pressure cylinder 8 and low pressure (LP) cylinder 9, and 6 steam of boiler and turbine body may be implemented It is completely isolated.

Claims (7)

1. a kind of emergency heating system realized large-scale Thermal generation unit and shut down not blowing out, which is characterized in that including heat supply network plus Hot device (1), heat supply network drainage pump (2), oxygen-eliminating device (3), the first regulating valve (K1), boiler (6), the second regulating valve (K2), high pressure cylinder (7), high pressure bypass valve (K3), auxiliary vapour header (5), low pressure (LP) cylinder (9), heat exchangers for district heating (1) and intermediate pressure cylinder (8);
The heat release side outlet of heat exchangers for district heating (1) is divided into two-way after heat supply network drainage pump (2), wherein all the way with oxygen-eliminating device (3) Entrance is connected, and another way is connected with the entrance of the first regulating valve (K1), and the outlet of oxygen-eliminating device (3) is divided into two-way, wherein one Road is connected with the water inlet of boiler (6), and another way is connected with the entrance of the second regulating valve (K2), the main steam of boiler (6) Outlet is divided into two-way, wherein being connected all the way with the entrance of high pressure cylinder (7), another way and the outlet of the second regulating valve (K2) pass through The entrance of pipeline and Guan Houyu high pressure bypass valve (K3) is connected, the outlet of high pressure cylinder (7) and the outlet of high pressure bypass valve (K3) By being divided into two-way after pipeline and pipe, wherein being connected all the way with the entrance of auxiliary vapour header (5), another way and boiler (6) are again Hot side entrance is connected, and the hot side outlet again of boiler (6) is divided into two-way, wherein being connected all the way with the entrance of intermediate pressure cylinder (8), separately Be connected all the way with the heat release side entrance of heat exchangers for district heating (1), the outlet of intermediate pressure cylinder (8) is divided into two-way, wherein all the way with low pressure The entrance of cylinder (9) is connected, and another way is connected with the heat release side entrance of heat exchangers for district heating (1), and the first regulating valve (K1) goes out Mouth is connected with the heat release side entrance of heat exchangers for district heating (1), and the outlet of auxiliary vapour header (5) is connected with the entrance of oxygen-eliminating device (3).
2. the emergency heating system according to claim 1 realized large-scale Thermal generation unit and shut down not blowing out, feature Be, oxygen-eliminating device (3) is divided into two-way after feed pump (4), wherein be connected all the way with the water inlet of boiler (6), another way with The entrance of second regulating valve (K2) is connected.
3. the emergency heating system according to claim 1 realized large-scale Thermal generation unit and shut down not blowing out, feature It is, outlet of the outlet of high pressure cylinder (7) after check-valves and first manual isolating valve with high pressure bypass valve (K3) passes through pipeline And it is divided into two-way after pipe, wherein it is connected all the way with the reheating side entrance of boiler (6), the entrance of another way and auxiliary vapour header (5) It is connected.
4. the emergency heating system according to claim 3 realized large-scale Thermal generation unit and shut down not blowing out, feature It is, the main-steam outlet of boiler (6) is connected through the second manual isolation valve and the first motor-operated isolation valve with the entrance of high pressure cylinder (7) It is logical.
5. the emergency heating system according to claim 4 realized large-scale Thermal generation unit and shut down not blowing out, feature It is, the reheated steam of boiler (6) exports the entrance phase through third manual isolation valve and the second motor-operated isolation valve and intermediate pressure cylinder (8) Connection.
6. the emergency heating system according to claim 5 realized large-scale Thermal generation unit and shut down not blowing out, feature It is, the outlet of intermediate pressure cylinder (8) enters through the cold side of third motor-operated isolation valve and the 4th manual isolation valve and heat exchangers for district heating (1) Mouth is connected.
7. the emergency heating system according to claim 6 realized large-scale Thermal generation unit and shut down not blowing out, feature It is, the outlet of the first regulating valve (K1) and the reheated steam of boiler (6) export after piping and pipe through the 4th electronic isolation Valve and the 5th manual modulation valve are connected with the heat release side entrance of heat exchangers for district heating (1).
CN201820824514.2U 2018-05-30 2018-05-30 A kind of emergency heating system realized large-scale Thermal generation unit and shut down not blowing out Active CN208312515U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500645A (en) * 2019-07-23 2019-11-26 国网辽宁省电力有限公司电力科学研究院 A kind of optimal control method promoting unit bypass heat supply running reliability
CN110925730A (en) * 2019-10-16 2020-03-27 孙少强 Emergency industrial heating system based on shutdown and non-shutdown of coal-fired generating set
CN110953571A (en) * 2019-10-16 2020-04-03 孙少强 Heat supply steam residual pressure cascade utilization system applied to coal-fired heat supply unit
CN111120013A (en) * 2019-12-13 2020-05-08 山东中实易通集团有限公司 Reliable steam supply system under unavailable working condition of steam turbine generator unit
CN111219702A (en) * 2020-01-16 2020-06-02 华电电力科学研究院有限公司 System safety protection device for heat supply during shutdown of steam turbine and operation method thereof
CN111288531A (en) * 2020-03-31 2020-06-16 西安西热节能技术有限公司 Emergency heating system and method based on high-low pressure bypass combined heating
CN114646084A (en) * 2022-03-23 2022-06-21 润电能源科学技术有限公司 Low-pressure bypass heating system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500645A (en) * 2019-07-23 2019-11-26 国网辽宁省电力有限公司电力科学研究院 A kind of optimal control method promoting unit bypass heat supply running reliability
CN110925730A (en) * 2019-10-16 2020-03-27 孙少强 Emergency industrial heating system based on shutdown and non-shutdown of coal-fired generating set
CN110953571A (en) * 2019-10-16 2020-04-03 孙少强 Heat supply steam residual pressure cascade utilization system applied to coal-fired heat supply unit
CN111120013A (en) * 2019-12-13 2020-05-08 山东中实易通集团有限公司 Reliable steam supply system under unavailable working condition of steam turbine generator unit
CN111219702A (en) * 2020-01-16 2020-06-02 华电电力科学研究院有限公司 System safety protection device for heat supply during shutdown of steam turbine and operation method thereof
CN111219702B (en) * 2020-01-16 2021-04-13 华电电力科学研究院有限公司 System safety protection device for heat supply during shutdown of steam turbine and operation method thereof
CN111288531A (en) * 2020-03-31 2020-06-16 西安西热节能技术有限公司 Emergency heating system and method based on high-low pressure bypass combined heating
CN114646084A (en) * 2022-03-23 2022-06-21 润电能源科学技术有限公司 Low-pressure bypass heating system

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