CN205279054U - Cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set - Google Patents
Cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set Download PDFInfo
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- CN205279054U CN205279054U CN201520994049.3U CN201520994049U CN205279054U CN 205279054 U CN205279054 U CN 205279054U CN 201520994049 U CN201520994049 U CN 201520994049U CN 205279054 U CN205279054 U CN 205279054U
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Abstract
The utility model discloses a cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set, it includes demineralized water water supply installation, oxygen -eliminating device and at least a set of cold sediment unit, demineralized water water supply installation's feed water inlet pass through the demineralized water delivery pipe respectively with every group the cooling water inlet of cold sediment unit connects, be provided with first valve on the demineralized water delivery pipe, every group the coolant outlet of cold sediment unit is all through the quick -witted outlet pipe of a cold sediment and one every is connected to the water inlet of oxygen -eliminating device all be equipped with the second valve on the cold sediment machine outlet pipe. The utility model provides a during cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set unit when adopting demineralized water water supply installation can solve present use condensate water water supply installation and provide the cooling water for cold sediment unit for cold sediment unit provides the cooling water opens and stops, lead to the fact the problem of oxygen -eliminating device overflow and low pressure feed water heater dry combustion method during the low load operation.
Description
Technical field:
The utility model relates to a kind of cooling system, particularly relates to a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system.
Background technology:
Current Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system only adopts steam turbine condensed water as the water coolant of lag cooler, owing to Direct Air-cooled Unit back pressure compares water chiller height, particularly summer environment temperature height, during unit load height, unit back pressuce obviously raises, condensing water temperature and lag cooler entrance coolant water temperature is caused to raise like this, 75-80 DEG C can be reached, and lag cooler leaving water temperature(LWT) necessary��90 DEG C, therefore in lag cooler, exchange capability of heat is limited, heat exchange deleterious, deslagging temperature raises, in the case, to ensure that same heat must increase cooling water inflow, but owing to unit condenses the water yield and unit water consumption must balance and the highest water quantitative limitation of cooling water system, therefore can not the unconfined increase water yield, therefore, to maintain stable operation of unit, boiler slag removal amount can only be reduced by reducing unit load, therefore, when in summer, unit maximum output only can maintain about 80%, economy is the reduction of official post generatine set heat efficiency relatively, power unit in economic operation impact is bigger. in addition when unit starting initial stage, shutdown and underrun, capacity of boiler is less, less to boiler water filling amount by deoxygenator, and the cooling water inflow that lag cooler needs is bigger, a large amount of water coolant can be caused to enter deoxygenator, owing to water cycle is uneven, causes deoxygenator to be in overflow situation, cause the waste of water and heat serious. in order to control the water yield, being forced to the condensed water through low pressure heater is closed the water yield that restriction enters deoxygenator, cause the dry combustion method of low pressure heater, reduce the work-ing life of low pressure heater, unit economy reduces.
Practical novel content:
The purpose of this utility model is to provide a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system, solves current Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system and only adopts steam turbine condensed water as during the water coolant of lag cooler, unit operational efficiency is low when envrionment temperature height and causes the waste of water and the low problem adding dry combustion method during performing low-load running of machine set.
In order to solve the problems of the technologies described above, the utility model provides a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system, it comprises de-mineralized water water supply installation, deoxygenator and at least one group of lag cooler group, being connected with the entrance of cooling water often organizing described lag cooler group respectively by de-mineralized water water-supply pipe for the mouth of a river of described de-mineralized water water supply installation, described de-mineralized water water-supply pipe is provided with the first valve, the cooling water outlet often organizing described lag cooler group is all connected with the water-in of a described deoxygenator by a lag cooler rising pipe, lag cooler rising pipe described in every root is equipped with the 2nd valve.
Further, the water outlet of the hydrophobic pump of boiler of described de-mineralized water water supply installation is also connected with the entrance of cooling water often organizing described lag cooler group respectively by described de-mineralized water water-supply pipe.
Further, it also includes condensation jellyfish pipe, the first low pressure heater, the 2nd low pressure heater and the 3rd low pressure heater, and described condensation jellyfish pipe is connected with described first low pressure heater, described 2nd low pressure heater and described 3rd low pressure heater in turn along current flow direction; The entrance of cooling water often organizing described lag cooler group is also connected with the described condensation jellyfish pipe of described first low pressure heater inlet end by the condensed water water-supply pipe of correspondence, and described condensed water water-supply pipe is provided with the 3rd valve; The water outlet of described condensation jellyfish pipe is connected with the water-in of described deoxygenator; The water-in of the cooling water outlet pipe female with lag cooler backwater often organizing described lag cooler group is connected, the water outlet of the female pipe of described lag cooler backwater is connected with the described condensation jellyfish pipe being connected between described first low pressure heater and described 2nd low pressure heater, and the female pipe of described lag cooler backwater is provided with the 4th valve.
Further, it includes two groups of lag cooler groups, often organizes described lag cooler group and comprises four lag cooler, and four described lag cooler are connected in parallel.
Advantage of the present utility model: a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system that the utility model provides realizes following advantage by a set of de-mineralized water water supply installation in parallel on the basis of condensed water water supply installation to the water supply of lag cooler group: first, can effectively utilize unit low-temperature water source, reduce lag cooler group entrance water temperature, reduce lag cooler group deslagging temperature further, effectively utilize the heat of boiler slag removal; 2nd, particularly solve the bottleneck problem of envrionment temperature height unit back pressuce height restriction lag cooler heat exchange effect in summer, unit 100% load operation can be ensured, it is to increase boiler output and unit operation stability, remarkable in economical benefits; 3rd, at the unit starting initial stage, Steam-water Flow can be balanced, avoid deoxygenator overflow and the problem of low pressure heater dry combustion method; 4th: can improve further and low add utilization ratio and deoxygenator entrance water temperature.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2.
Accompanying drawing is described as follows: 1, de-mineralized water water supply installation; 101, drain tank; 102, the hydrophobic pump of boiler; 103, recirculation (egr) valve; 2, lag cooler group; 3, deoxygenator; 4, de-mineralized water water-supply pipe; 5, the first valve; 6, lag cooler rising pipe; 7, the 2nd valve; 8, condense jellyfish pipe; 9, the first low pressure heater; 10, the 2nd low pressure heater; 11, the 3rd low pressure heater; 12, condensed water water-supply pipe; 13, the 3rd valve; 14, lag cooler backwater mother pipe; 15, the 4th valve.
Embodiment:
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment 1: as shown in Figure 1, in embodiment of the present utility model, provide a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system, comprise: de-mineralized water water supply installation 1, two deoxygenators 3 and two groups of lag cooler groups 2, often organize lag cooler group 2 and comprise four lag cooler, four lag cooler are connected in parallel, and de-mineralized water water supply installation 1 comprises drain tank 101, the hydrophobic pump 102 of boiler and recirculation (egr) valve 103; The water-in pipeline of drain tank 101 water outlet pump 102 hydrophobic with boiler is connected, and the water outlet of the hydrophobic pump 102 of boiler is connected with the water-in pipeline of recirculation (egr) valve 103, and the water outlet of recirculation (egr) valve 103 and the water return outlet pipeline of drain tank 101 connect; The water outlet of the hydrophobic pump 102 of boiler is also connected with the entrance of cooling water often organizing lag cooler group 2 respectively by de-mineralized water water-supply pipe 4; Being provided with the first valve 5 on de-mineralized water water-supply pipe 4, the cooling water outlet often organizing lag cooler group 2 is all connected with the water-in of a deoxygenator 3 by a lag cooler rising pipe 6, and every root lag cooler rising pipe 6 is equipped with the 2nd valve 7.
A kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system that the utility model embodiment provides with the use of de-mineralized water water supply installation 1 for lag cooler group 2 supply water time, do not connect low pressure heater, therefore deoxygenator 3 is not from the water of low pressure heater, at the unit starting initial stage, Steam-water Flow can be balanced, avoid the dry combustion method of deoxygenator 3 overflow and low pressure heater.
Embodiment 2: as shown in Figure 2, in embodiment of the present utility model, provide a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system, comprise: de-mineralized water water supply installation 1, two deoxygenators, 3, two groups of lag cooler groups 2, condensation jellyfish pipe 8, first low pressure heater 9, the 2nd low pressure heater 10 and the 3rd low pressure heater 11, often organize lag cooler group 2 and comprise four lag cooler, four lag cooler are connected in parallel, and de-mineralized water water supply installation 1 comprises drain tank 101, the hydrophobic pump 102 of boiler and recirculation (egr) valve 103; The water-in pipeline of drain tank 101 water outlet pump 102 hydrophobic with boiler is connected, and the water outlet of the hydrophobic pump 102 of boiler is connected with the water-in pipeline of recirculation (egr) valve 103, and the water outlet of recirculation (egr) valve 103 and the water return outlet pipeline of drain tank 101 connect; The water outlet of the hydrophobic pump 102 of boiler is also connected with the entrance of cooling water often organizing lag cooler group 2 respectively by de-mineralized water water-supply pipe 4; Being provided with the first valve 5 on de-mineralized water water-supply pipe 4, the cooling water outlet often organizing lag cooler group 2 is all connected with the water-in of a deoxygenator 3 by a lag cooler rising pipe 6, and every root lag cooler rising pipe 6 is equipped with the 2nd valve 7; Condensation jellyfish pipe 8 is connected with the first low pressure heater 9, the 2nd low pressure heater 10 and the 3rd low pressure heater 11 in turn along current flow direction; The entrance of cooling water often organizing lag cooler group 2 is also connected by the condensation jellyfish pipe 8 of the condensed water water-supply pipe 12 of correspondence with the first low pressure heater 9 inlet end, and condensed water water-supply pipe 12 is provided with the 3rd valve 13; The water outlet of condensation jellyfish pipe 8 is connected with the water-in of deoxygenator 3; The water-in of the cooling water outlet pipe 14 female with lag cooler backwater often organizing lag cooler group 2 is connected, the water outlet of the female pipe 14 of lag cooler backwater is connected with the condensation jellyfish pipe 8 being connected between the first low pressure heater 9 and the 2nd low pressure heater 10, and the female pipe 14 of lag cooler backwater is provided with the 4th valve 15.
A kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system of embodiment 2 can realize three kinds of working ordeies by the switch of each valve, and being respectively and being used alone that the hydrophobic pump 102 of boiler supplies water for lag cooler group 2, is used alone condensate system is that lag cooler group 2 supplies water and the hydrophobic pump 102 of boiler and condensate system supply water for lag cooler group 2 simultaneously.
It is used alone operation scheme and workflow that the hydrophobic pump of boiler 102 is lag cooler group 2 water supply: the first hydrophobic pump 102 of starting trouble, the pressure of top hole pressure higher than the first low pressure heater 9 inlet end of the hydrophobic pump 102 of boiler is adjusted by recirculation (egr) valve 103, then the first valve 5 is slowly opened, this process is it is noted that the changing conditions of lag cooler group 2 cold in-water temperature and pressure, and suitably close little recirculation (egr) valve 103 to maintain the top hole pressure of the hydrophobic pump 102 of boiler, when the first valve 5 standard-sized sheet, can slowly close the 3rd valve 13, until the 3rd valve 13 closes entirely. then the 2nd valve 7 is slowly opened, then entirely closing the 4th valve 15, now operation condition achieves lag cooler group 2 and is used alone the operation scheme that the hydrophobic pump 102 of boiler is lag cooler group 2 water supply. according to the change of unit load and the quantity of slag in operational process, by regulating recirculation (egr) valve 103 and the 2nd valve 7 to carry out the controlled cooling model water yield. during this operation scheme is applicable to unit start and stop, during underrun.
It is used alone operation scheme and workflow that condensate system is lag cooler group 2 water supply: first open the 4th valve 15, then the 2nd valve 7 is closed, open the 4th valve 15 in the process, close the 2nd valve 7 to be hocketed, to ensure that lag cooler group 21 cooling water system pressure is higher than condensed water generator pressure 0.1MPa, until the 4th valve 15 standard-sized sheet, 2nd valve 7 closes entirely, then the 3rd valve 13 is slowly opened, until the 3rd valve 13 standard-sized sheet, then the first valve 5 is slowly closed, this process is it is noted that the changing conditions of lag cooler group 2 cold in-water temperature and pressure, and suitably open big recirculation (egr) valve 103 and stablize to maintain the top hole pressure of the hydrophobic pump 102 of boiler, until the first valve 5 closes entirely, now operation condition achieves lag cooler group 2 and is used alone the operation scheme that condensate system is lag cooler group 2 water supply. according to the change of unit load and the quantity of slag in operational process, by regulating the 3rd valve 12 and the 4th valve 15 to carry out the controlled cooling model water yield. this operation scheme is applicable to high loading and the low operating mode of envrionment temperature.
The hydrophobic pump of boiler 102 and condensate system are operation scheme and the workflow of lag cooler group 2 water supply simultaneously: the first hydrophobic pump 102 of starting trouble, the pressure of top hole pressure higher than the first low pressure heater 9 inlet end of the hydrophobic pump 102 of boiler is adjusted by recirculation (egr) valve 103, then the first valve 5 is slowly opened, this process is it is noted that the changing conditions of lag cooler group 2 cold in-water temperature and pressure, and suitably close little recirculation (egr) valve 103 to maintain the top hole pressure of the hydrophobic pump 102 of boiler, slowly close little 3rd valve 13, standard-sized sheet the 4th valve 15, close the 2nd valve 7, in this case, workflow will become two systems and supply water for lag cooler group 2 simultaneously, water balance is realized by adjustment valve opening. this workflow is applicable to unit high loading and the high operating mode of envrionment temperature.
To sum up, the cooling system of embodiment 2 meets the operation in the different environment of unit by the switch of valve.
The cooling system that the present embodiment provides, it may be achieved following advantage, first: can effectively utilize unit low-temperature water source, reduce lag cooler group 2 entrance water temperature, reduce lag cooler group 2 deslagging temperature further, effectively utilize the heat of boiler slag removal; 2nd: the bottleneck problem particularly solving envrionment temperature height unit back pressuce height restriction lag cooler group 2 heat exchange effect in summer, can ensure unit 100% load operation, it is to increase boiler output and unit operation stability, remarkable in economical benefits; 3rd: at the unit starting initial stage, Steam-water Flow can be balanced, avoid deoxygenator 3 overflow and low pressure heater dry combustion method, the 4th: low pressure heater utilization ratio and deoxygenator 3 entrance water temperature can be improved further.
It it is more than preferred implementation of the present utility model; it is noted that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also making some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system, it is characterized in that, it comprises de-mineralized water water supply installation, deoxygenator and at least one group of lag cooler group, being connected with the entrance of cooling water often organizing described lag cooler group respectively by de-mineralized water water-supply pipe for the mouth of a river of described de-mineralized water water supply installation, described de-mineralized water water-supply pipe is provided with the first valve, the cooling water outlet often organizing described lag cooler group is all connected with the water-in of a described deoxygenator by a lag cooler rising pipe, and lag cooler rising pipe described in every root is equipped with the 2nd valve.
2. a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system according to claim 1, it is characterized in that, the water outlet of the hydrophobic pump of boiler of described de-mineralized water water supply installation is also connected with the entrance of cooling water often organizing described lag cooler group respectively by described de-mineralized water water-supply pipe.
3. a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system according to claim 1 and 2, it is characterized in that, it also includes condensation jellyfish pipe, the first low pressure heater, the 2nd low pressure heater and the 3rd low pressure heater, and described condensation jellyfish pipe is connected with described first low pressure heater, described 2nd low pressure heater and described 3rd low pressure heater in turn along current flow direction; The entrance of cooling water often organizing described lag cooler group is also connected with the described condensation jellyfish pipe of described first low pressure heater inlet end by the condensed water water-supply pipe of correspondence, and described condensed water water-supply pipe is provided with the 3rd valve; The water outlet of described condensation jellyfish pipe is connected with the water-in of described deoxygenator; The water-in of the cooling water outlet pipe female with lag cooler backwater often organizing described lag cooler group is connected, the water outlet of the female pipe of described lag cooler backwater is connected with the described condensation jellyfish pipe being connected between described first low pressure heater and described 2nd low pressure heater, and the female pipe of described lag cooler backwater is provided with the 4th valve.
4. a kind of Direct Air-Cooled steam-extracting type turbine driven set lag cooler cooling system according to claim 3, it is characterised in that, it includes two groups of lag cooler groups, often organizes described lag cooler group and comprises four lag cooler, and four described lag cooler are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994049.3U CN205279054U (en) | 2015-12-03 | 2015-12-03 | Cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520994049.3U CN205279054U (en) | 2015-12-03 | 2015-12-03 | Cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set |
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| CN205279054U true CN205279054U (en) | 2016-06-01 |
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| CN201520994049.3U Active CN205279054U (en) | 2015-12-03 | 2015-12-03 | Cold sediment machine cooling system of direct air cooling steam extraction type turbo generator set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989382A (en) * | 2017-05-24 | 2017-07-28 | 中国能源建设集团湖南省电力设计院有限公司 | A kind of thermal power plant Slag Cooler for Circulation Fluidized Bed Boiler cooling water system |
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2015
- 2015-12-03 CN CN201520994049.3U patent/CN205279054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989382A (en) * | 2017-05-24 | 2017-07-28 | 中国能源建设集团湖南省电力设计院有限公司 | A kind of thermal power plant Slag Cooler for Circulation Fluidized Bed Boiler cooling water system |
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Effective date of registration: 20160622 Address after: 750336 the Inner Mongolia Autonomous Region Ulanbuh Street Alashan Alashan Economic Development Zone Patentee after: China National Salt Industry Corporation Jilantai Chlorine and Alkali Chemical Co., Ltd. Address before: In 750336 the Inner Mongolia Autonomous Region Alashan Alashan Economic Development Zone comprehensive science and Technology Building Patentee before: CHINA NATIONAL SALT INDUSTRY CORPORATION JILANTAI SALT CHEMICAL GROUP |