CN203442933U - High back pressure heating system of 300MW generator set - Google Patents
High back pressure heating system of 300MW generator set Download PDFInfo
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- CN203442933U CN203442933U CN201320540114.6U CN201320540114U CN203442933U CN 203442933 U CN203442933 U CN 203442933U CN 201320540114 U CN201320540114 U CN 201320540114U CN 203442933 U CN203442933 U CN 203442933U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model provides a high back pressure heating system of a 300MW generator set. The high back pressure heating system comprises a parallel type two-stage heating tube (1), a condenser (2), a heating network circulation pump (3) and a heating network heater (4). An air inlet of the parallel type two-stage heating tube (1) is connected with a heating network circulation heat tube (6) of the 300MW generator set, a first air outlet of the parallel type two-stage heating tube (1) is connected with an air inlet of the condenser (2), a second air outlet of the parallel type two-stage heating tube (1) is connected with an air inlet of the heating network heater (4), a water outlet of the condenser (2) is connected with a water inlet of the heating network heater (4) through the heating network circulation pump (3), the water outlet of the heating network heater (4) is connected with a heating network water supply port (7), and a heating network water return port (8) is connected with a water inlet of the condenser (2). According to the high back pressure heating system of the 300MW generator set, hot air discharged by a 300MW generator set system is used for supplying heat to the heating system in a parallel type two-stage heating mode, the heat energy utilization rate of the 300MW generator set can be effectively improved, and energy consumption is reduced.
Description
Technical field
The utility model relates to a kind of 300MW generating set high back pressure heating system, belongs to motor heating equipment technical field.
Background technology
The cogeneration units of moving at present, the following generating set of 50MW generally generally adopts adjustable drawing gas or the heat supply of back pressure unit, and the heat supplies of the basic all employings of 100MW and above generating set extraction condensing type.The existing 300MW generating set circulation system of take is example, and maximum thermal loss comes from steam turbine discharge portion, and the heat that Exhaust Gas is taken away accounts for the more than 40% of whole system heat.But the heat that in the prior art, sucking condensing turbine discharge portion is discharged also fails effectively to utilize.
Summary of the invention
The problem of the utility model for solving the heat of existing sucking condensing turbine discharge portion discharge and failing effectively to utilize, and then a kind of 300MW generating set high back pressure heating system is provided.For this reason, the utility model provides following technical scheme:
A generating set high back pressure heating system, comprising: parallel two-step heating pipe, condenser, pumps for hot water supply net and heat exchangers for district heating; The air inlet of parallel two-step heating pipe is connected with the heat supply network circulating heat pipe of 300MW generating set, the first gas outlet of parallel two-step heating pipe is connected with the air inlet of condenser, the second gas outlet of parallel two-step heating pipe is connected with the air inlet of heat exchangers for district heating, the delivery port of condenser is connected with the water inlet of heat exchangers for district heating by pumps for hot water supply net, the delivery port of heat exchangers for district heating is connected with heat supply network feed water inlet, and heat supply network water return outlet is connected with the water inlet of condenser.
The 300MW generating set high back pressure heating system that the utility model provides is heating system heat supply by the mode of parallel two-step heating by the hot gas of 300MW generating set system discharge, can effectively improve the heat utilization rate of 300MW generating set, and save energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the 300MW generating set high back pressure heating system that provides of the specific embodiment of the present utility model.
The specific embodiment
Below in conjunction with the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
The specific embodiment of the present utility model provides a kind of 300MW generating set high back pressure heating system, as shown in Figure 1, comprising: parallel two-step heating pipe 1, condenser 2, pumps for hot water supply net 3 and heat exchangers for district heating 4; The air inlet of parallel two-step heating pipe 1 is connected with the heat supply network circulating heat pipe 6 of 300MW generating set, the first gas outlet of parallel two-step heating pipe 1 is connected with the air inlet of condenser 2, the second gas outlet of parallel two-step heating pipe 1 is connected with the air inlet of heat exchangers for district heating 4, the delivery port of condenser 2 is connected with the water inlet of heat exchangers for district heating 4 by pumps for hot water supply net 3, the delivery port of heat exchangers for district heating 4 is connected with heat supply network feed water inlet 7, and heat supply network water return outlet 8 is connected with the water inlet of condenser 2.
Concrete, heat exchange requirement for As soon as possible Promising Policy first-degree heating network and secondary heat supply network, the 300MW generating set high back pressure heating system that this specific embodiment provides adopts parallel two-step heating pipe 1 to be connected with the heat supply network circulating heat pipe 6 of 300MW generating set, row in this 300MW generating set draws gas or other 300MW take out drawing gas of solidifying unit and first through condenser 2, heat for the first time, absorb low pressure (LP) cylinder exhausted spare heat, and then through pumps for hot water supply net 3, delivery to the heat exchangers for district heating 4 of heating is for the first time completed to heating for the second time, generate high-temperature-hot-water, high-temperature-hot-water delivers to secondary heat exchange station by heat supply network feed water inlet 7 and secondary heat supply network recirculated water carries out heat exchange, after high-temperature-hot-water is cooling, return unit condenser 2, the circulation waterway of complete, form new " heat-water " exchange system.After circulating water loop has switched, the discharge that enters condenser 2 is down to 15000t/h, and the back pressure of condenser 2 rises to 30～40kPa by 5～7kPa left and right, and low pressure (LP) cylinder exhaust temperature rises to 69～76 ℃ (saturation temperatures that back pressure is corresponding) by 30～40 ℃.Through the heating for the first time of condenser 2, heat supply network recirculated water return water temperature is promoted to 66～73 ℃ (3 ℃ of condenser terminal differences) by 50 ℃, then after pumps for hot water supply net 3 boosts, sends into heat exchangers for district heating 4, and heat supply network supply water temperature is further fed to heat supply network one time after heating.
Because steam turbine operation steady in a long-term is subject to exhaust temperature not higher than the restriction of 85 ℃, consider condenser terminal difference, the recirculated water leaving water temperature of high back pressure heat supply is not generally higher than 75 ℃, water supply, return water temperature scope are generally 60 ℃～75 ℃ of water supply, 50 ℃～70 ℃, backwater, and corresponding operation back pressure is 25～45kPa.Heating Period high back pressure operating unit can load to supply thermal conditioning by suitable adjustment under the prerequisite that guarantees displacement, electricity determining by heat, quantity of circulating water remains unchanged, can control heating load by adjusting supply water temperature, when heat demand is maximum, the maximum throttle flow of system can reach 1025t/h, but displacement can not surpass 345t/h, otherwise need to increase quantity of circulating water, to guarantee vacuum.
In this specific embodiment one preferred embodiment, when 300MW generating set high back pressure heating system is when pure condensate operating mode is moved, condensing tower 5 can be set in system, and the water inlet of condensing tower 5 is connected with the delivery port of condenser 2, thereby the back pressure of condenser 2 is returned to 5～7kPa.
In this specific embodiment one preferred embodiment, described system can also comprise water circulating pump 9, and water circulating pump 9 is connected in parallel on the pipeline between heat supply network water return outlet 8 and the water inlet of condenser 2, for improving the speed of hot water circuit when the water shortage.
In this specific embodiment one preferred embodiment, on the pipeline between the delivery port and pumps for hot water supply net 3 of condenser 2, between heat supply network water return outlet 8 and the water inlet of condenser 2, between the water inlet of condensing tower 5 and the delivery port of condenser 2, between water circulating pump 9 and the water inlet of condenser 2, be provided with water valve 10, valve 10 is for closing where necessary one or more pipelines, so that the pressure of whole system and temperature remain on normal value.
The technical scheme that adopts this specific embodiment to provide, 14746 tons of water can be heated to 107.6 ℃ by 60 ℃, and existing heating system only can be heated to 107.3 ℃ by 60 ℃ by 13085 tons of water, and total thermal discharge increases by 12.7%; The difference of considering two kinds of method of operation electrical power, a unit makes into after high back pressure heat supply, has more steam to enter low pressure (LP) cylinder acting, power=249.6-246.2=3.4MW that Heating Period increases.
The above; it is only the preferably specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model embodiment discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (4)
1. a 300MW generating set high back pressure heating system, is characterized in that, comprising: parallel two-step heating pipe (1), condenser (2), pumps for hot water supply net (3) and heat exchangers for district heating (4); The air inlet of parallel two-step heating pipe (1) is connected with the heat supply network circulating heat pipe (6) of 300MW generating set, the first gas outlet of parallel two-step heating pipe (1) is connected with the air inlet of condenser (2), the second gas outlet of parallel two-step heating pipe (1) is connected with the air inlet of heat exchangers for district heating (4), the delivery port of condenser (2) is connected with the water inlet of heat exchangers for district heating (4) by pumps for hot water supply net (3), the delivery port of heat exchangers for district heating (4) is connected with heat supply network feed water inlet (7), and heat supply network water return outlet (8) is connected with the water inlet of condenser (2).
2. 300MW generating set high back pressure heating system according to claim 1, is characterized in that, described system also comprises condensing tower (5), and the water inlet of condensing tower (5) is connected with the delivery port of condenser (2).
3. 300MW generating set high back pressure heating system according to claim 2, it is characterized in that, described system also comprises water circulating pump (9), and water circulating pump (9) is connected in parallel on the pipeline between heat supply network water return outlet (8) and the water inlet of condenser (2).
4. 300MW generating set high back pressure heating system according to claim 3, it is characterized in that, on the pipeline between the delivery port and pumps for hot water supply net (3) of condenser (2), between heat supply network water return outlet (8) and the water inlet of condenser (2), between the water inlet of condensing tower (5) and the delivery port of condenser (2), between water circulating pump (9) and the water inlet of condenser (2), be provided with water valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540114.6U CN203442933U (en) | 2013-09-02 | 2013-09-02 | High back pressure heating system of 300MW generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540114.6U CN203442933U (en) | 2013-09-02 | 2013-09-02 | High back pressure heating system of 300MW generator set |
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| Publication Number | Publication Date |
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| CN203442933U true CN203442933U (en) | 2014-02-19 |
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| CN201320540114.6U Expired - Fee Related CN203442933U (en) | 2013-09-02 | 2013-09-02 | High back pressure heating system of 300MW generator set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202355A (en) * | 2017-06-06 | 2017-09-26 | 大唐东北电力试验研究所有限公司 | High back pressure birotor electric heating unit heating system |
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2013
- 2013-09-02 CN CN201320540114.6U patent/CN203442933U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202355A (en) * | 2017-06-06 | 2017-09-26 | 大唐东北电力试验研究所有限公司 | High back pressure birotor electric heating unit heating system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 |