CN203421769U - 300MW generator set high-back-pressure circulating water system - Google Patents
300MW generator set high-back-pressure circulating water system Download PDFInfo
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- CN203421769U CN203421769U CN201320543485.XU CN201320543485U CN203421769U CN 203421769 U CN203421769 U CN 203421769U CN 201320543485 U CN201320543485 U CN 201320543485U CN 203421769 U CN203421769 U CN 203421769U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Abstract
The utility model provides a 300MW generator set high-back-pressure circulating water system comprising a first heat grid heater (1), a first circulating water pipe (2), a second heat grid heater (3), a second circulating water pipe (4), a connecting water pipe (5), and a connecting butterfly valve (6). A heated part of the first circulating water pipe (2) is disposed inside the first heat grid heater (1), and a heated part of the second circulating water pipe (4) is disposed inside the second heat grid heater (3). The connecting water pipe (5) is disposed between a water outlet of the first circulating water pipe (2) and a water outlet of the second circulating water pipe (4). The connecting water pipe (5) is provided with the connecting butterfly valve (6). Through enlarging heat exchange temperature difference, heat exchange capacity of a condenser is sufficient for operation under same circulating water flow conditions; during operation under high back pressure, a heat grid circulating water pump is connected to the outlet side of the condenser, and the pressure of a circulating water inlet of the condenser is lower than allowable operating pressure of the condenser; accordingly, the strength of the condenser needs no checking, normal operation of a unit after modification is guaranteed, and economy is high.
Description
Technical field
The utility model relates to a kind of 300MW generating set high back pressure circulation, belongs to motor heating equipment technical field.
Background technology
The cogeneration units of moving at present, in the winter time under the operating mode of heating, 300MW generating set high back pressure circulation heat supply unit is compared with extraction condensing type unit, while moving under supplying thermal condition due to back pressure unit, must replace recirculated water as condenser cooling water source to hot net water, so the economy of heat supply be poor.
Summary of the invention
The poor problem of economical effect of heat-supply that must replace recirculated water to cause as condenser cooling water source to hot net water that the utility model exists for solving existing 300MW generating set high back pressure circulation heat supply process, and then a kind of 300MW generating set high back pressure circulation is provided.For this reason, the utility model provides following technical scheme:
A generating set high back pressure circulation, comprising: the first heat exchangers for district heating, the first circulating water pipe, the second heat exchangers for district heating, the second circulating water pipe, connection water pipe and connection butterfly valve; The heated portion of the first circulating water pipe is arranged in the first heat exchangers for district heating, the heated portion of the second circulating water pipe is arranged in the second heat exchangers for district heating, between the delivery port of the delivery port of the first circulating water pipe and the second circulating water pipe, be provided with and be communicated with water pipe, be provided with connection butterfly valve being communicated with on water pipe.
The 300MW generating set high back pressure circulation that the utility model provides is by strengthening heat transfer temperature difference, under same quantity of circulating water condition, the exchange capability of heat of condenser is enough to meet operation needs, when high back pressure moves, circulation pump of heat-supply network is connected on condenser water outlet side, and condenser recirculated water inlet pressure is lower than condenser permissible working pressure, so condenser intensity does not need to adjust, guarantee the normal operation after Transformation of Unit, there is higher economy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the 300MW generating set high back pressure circulation 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 circulation, as shown in Figure 1, comprising: the first heat exchangers for district heating 1, the first circulating water pipe 2, the second heat exchangers for district heating 3, the second circulating water pipe 4, connection water pipe 5 and connection butterfly valve 6; The heated portion of the first circulating water pipe 2 is arranged in the first heat exchangers for district heating 1, the heated portion of the second circulating water pipe 4 is arranged in the second heat exchangers for district heating 3, between the delivery port of the delivery port of the first circulating water pipe 2 and the second circulating water pipe 4, be provided with and be communicated with water pipe 5, be provided with and be communicated with butterfly valve 6 being communicated with on water pipe 5.
Concrete, when heat network system supply and return water temperature is 60/105.5 ℃, the design heat supply network quantity of circulating water of existing heat network system is 12000t/h, after transformation, need to increase by 2 of circulation pump of heat-supply networks, to meet the needs of large flow, the little temperature difference method of operation, the heat supply network quantity of circulating water before transformation is 13000～14500t/h, and SR is about 0.6MPa left and right, after transformation, be 14850t/h, changes in flow rate is little.Original circulation pump of heat-supply network lift is 1.07MPa, can meet improved demand.Because first-degree heating network water system need to be connected with circulation, consider the method for operation and the requirement of switching fast, system need to increase 4 of acceleration switching valves and the corresponding pipe-line system of DN900.Operational reliability when guaranteeing that Heating Period starts and finishes, need to consider the circulation switching problem of heat supply network recirculated water and former unit.When the circulating water of former unit is unified the switching of heat supply network circulation, adopt and reduce load, condenser is half of to be moved.In operation handoff procedure, adopt to reduce load, the mode of the half of operation of condenser, is also the adjustment mode that condenser allows, and adjustment during pure condensate operation does not have essential difference.If runtime back pressure unit fault, can adopt recirculated water directly to start.Another kind of scheme can adopt butterfly valve to be arranged on recirculated water entrance, and two water inlets of connecting, change condenser into 4 flow processs by 2 flow processs, can relatively increase quantity of circulating water like this, improves water flow velocity in cooling tube.
When during heating, low vacuum circulating water heating operating mode is moved, under 300MW unit pure condensate operating mode, needed cooling column and water circulating pump are out of service, the circulation of condenser is switched to the hot water pipe net circulating water loop that pumps for hot water supply net is set up, form new " heat-water " exchange system.After circulating water loop has switched, the discharge that enters condenser is down to 15000t/h, and back pressure of condenser 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 ℃.Heating for the first time through condenser, 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 boosts, send into initial station heat exchangers for district heating, heat supply network supply water temperature is further fed to heat supply network one time after heating.
In this specific embodiment one preferred embodiment, the water inlet of the first circulating water pipe 2 is communicated with hot net water entrance, and the delivery port of the second circulating water pipe 4 is communicated with hot net water outlet.
In this specific embodiment one preferred embodiment, in described hot net water entrance and the outlet of described hot net water, be provided with water valve 7.
In this specific embodiment one preferred embodiment, on the delivery port of the first circulating water pipe 2 and water inlet, be provided with water valve 7, on the delivery port of the second circulating water pipe 4 and water inlet, be provided with water valve 7.
The technical scheme that adopts this specific embodiment to provide, by strengthening heat transfer temperature difference, under same quantity of circulating water condition, the exchange capability of heat of condenser is enough to meet operation needs, and when high back pressure moves, circulation pump of heat-supply network is connected on condenser water outlet side, condenser recirculated water inlet pressure is lower than condenser permissible working pressure, therefore condenser intensity does not need to adjust, and has guaranteed the normal operation after Transformation of Unit, has higher economy.
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 circulation, it is characterized in that, comprising: the first heat exchangers for district heating (1), the first circulating water pipe (2), the second heat exchangers for district heating (3), the second circulating water pipe (4), connection water pipe (5) and connection butterfly valve (6); The heated portion of the first circulating water pipe (2) is arranged in the first heat exchangers for district heating (1), the heated portion of the second circulating water pipe (4) is arranged in the second heat exchangers for district heating (3), between the delivery port of the first circulating water pipe (2) and the delivery port of the second circulating water pipe (4), be provided with and be communicated with water pipe (5), be provided with and be communicated with butterfly valve (6) being communicated with on water pipe (5).
2. 300MW generating set high back pressure circulation according to claim 1, is characterized in that, the water inlet of the first circulating water pipe (2) is communicated with hot net water entrance, and the delivery port of the second circulating water pipe (4) is communicated with hot net water outlet.
3. 300MW generating set high back pressure circulation according to claim 2, is characterized in that, in described hot net water entrance and the outlet of described hot net water, is provided with water valve (7).
4. 300MW generating set high back pressure circulation according to claim 3, it is characterized in that, on the delivery port of the first circulating water pipe (2) and water inlet, be provided with water valve (7), on the delivery port of the second circulating water pipe (4) and water inlet, be provided with water valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543485.XU CN203421769U (en) | 2013-09-03 | 2013-09-03 | 300MW generator set high-back-pressure circulating water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320543485.XU CN203421769U (en) | 2013-09-03 | 2013-09-03 | 300MW generator set high-back-pressure circulating water system |
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| Publication Number | Publication Date |
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| CN203421769U true CN203421769U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320543485.XU Expired - Fee Related CN203421769U (en) | 2013-09-03 | 2013-09-03 | 300MW generator set high-back-pressure circulating water system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910454A (en) * | 2016-05-17 | 2016-08-31 | 山东泓奥电力科技有限公司 | Direct high back pressure heat supply system of indirect air cooling unit |
| CN107191232A (en) * | 2017-06-06 | 2017-09-22 | 大唐东北电力试验研究所有限公司 | Electric heating unit heating system |
-
2013
- 2013-09-03 CN CN201320543485.XU patent/CN203421769U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910454A (en) * | 2016-05-17 | 2016-08-31 | 山东泓奥电力科技有限公司 | Direct high back pressure heat supply system of indirect air cooling unit |
| CN107191232A (en) * | 2017-06-06 | 2017-09-22 | 大唐东北电力试验研究所有限公司 | Electric heating unit heating system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 |