CN205607235U - Hot media water tubular heat exchanger control system - Google Patents

Hot media water tubular heat exchanger control system Download PDF

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Publication number
CN205607235U
CN205607235U CN201620105192.7U CN201620105192U CN205607235U CN 205607235 U CN205607235 U CN 205607235U CN 201620105192 U CN201620105192 U CN 201620105192U CN 205607235 U CN205607235 U CN 205607235U
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China
Prior art keywords
heat medium
hot media
water
medium water
regulating valve
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Application number
CN201620105192.7U
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Chinese (zh)
Inventor
李清毅
俞峰苹
胡达清
曹御风
孟炜
金军
钱晓峰
李文华
赵金龙
陈文华
张建龙
程纪东
章超
陶军
王汝能
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG ZHENENG WENZHOU POWER GENERATION Co.,Ltd.
Zhejiang Tiandi Environmental Protection Technology Co Ltd
Original Assignee
ZHEJIANG ZHENENG WENZHOU ELECTRICITY GENERATION CO Ltd
Zhejiang Tiandi Environmental Protection Technology Co Ltd
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Priority to CN201620105192.7U priority Critical patent/CN205607235U/en
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Abstract

The utility model relates to a hot media water tubular heat exchanger control system, including gas cooler, flue gas heater, hot media water moisturizing case, hot media water pump, hot media water steam heater, a passageway hot media water water inlet regulating valve, B passageway hot media water water inlet regulating valve, hot media water bypass regulation valve and steam control valve, hot media water moisturizing case links to each other with flue gas heater and hot media water pump, and A passageway hot media water water inlet regulating valve and B passageway hot media water water inlet regulating valve are connected respectively to the hot media water pump, and A passageway hot media water water inlet regulating valve and B passageway hot media water water inlet regulating valve connect a set of gas cooler respectively, and two sets of gas coolers link to hot media water hot media water 2, hot media water steam heater reconnection to flue gas heater. The beneficial effects of the utility model are that: control flue gas cooler outlet's that can be fine flue -gas temperature maintains certain within range, the better dust collection efficiency that assurance electrostatic precipitator is high.

Description

Heat medium water pipe heat exchanger control system
Technical field
This utility model patent relates to control system, particularly relates to a kind of heat medium water pipe heat exchanger control system.
Background technology
For solving " gypsum rain " problem that coal-burning power plant the most generally exists, and it is the tightest preferably to meet flue gas pollutant The emission request of lattice, typically arranges heat medium water pipe heat exchanger, and it includes gas cooler and flue gas heater.It can reach Three below purpose: before gas cooler is arranged on dry electrostatic cleaner, is lowered into the flue-gas temperature of electric cleaner, respectively Plant the temperature of control entrance electric cleaner under operating mode and maintain in certain scope, it is ensured that the efficiency of dust collection that electric cleaner is higher; After flue gas heater is arranged in wet electrical dust precipitator, transmit heat by heat medium water medium, compared with swinging GGH, will not Cause smoke spillage, more preferably ensure desulfurization and dust removing effects;Being utilized by fume afterheat, lifting enters the flue-gas temperature of chimney, " gypsum rain " problem of solution.
In the unit starting stage, ignition of the boiler produces flue gas SO2、SO3And flue gas water smoke, if gas cooler and flue gas add Hot device water temperature is less than flue-gas temperature, can cause gas cooler and flue gas heater tube wall condensation, corrosion, cool down because of flue gas simultaneously Environment dust concentration residing for device is higher, easily makes flue dust stick, dust stratification and fouling, affects heat-transfer surface and deteriorates.At compressor emergency shutdown Process, is similar to the unit starting stage, and flue-gas temperature, less than flue gas dew point temperature, brings corrosion to gas cooler.At machine Group normal course of operation in, need ensure matchmaker's waterpipe type heat exchanger under various operating modes the flue-gas temperature of electric cleaner entrance one In the range of Ding, need to ensure that the flue-gas temperature of flue gas heater outlet reaches to design requirement under various operating modes, needs to ensure respectively Plant the heat-transfer surface of gas cooler and flue gas heater under operating mode not occur because of the low dust stratification caused of heat exchanger tube wall temperature and corrosion.
Utility model content
The purpose of this utility model is to overcome prior art not enough, provides a kind of rational in infrastructure, meets the heating agent water pipe of requirements Formula Heat Exchanger Control System.
For achieving the above object, this utility model have employed techniques below scheme:
Heat medium water pipe heat exchanger control system, including gas cooler, flue gas heater, heat medium water water supply tank, heating agent water pump, Heat medium water steam heater, A channel heat medium water inlet regulating valve, channel B heat medium water inlet regulating valve, heat medium water bypass valve And steam control valve, described heat medium water water supply tank is connected with flue gas heater and heating agent water pump, and heating agent water pump connects A channel respectively Heat medium water inlet regulating valve and channel B heat medium water inlet regulating valve, A channel heat medium water inlet regulating valve and channel B heat medium water enter Water regulating valve connects one group of gas cooler respectively, and two groups of gas coolers are connected to heat medium water steam heater, and described heat medium water steams Vapour heater is then connected to flue gas heater, is additionally provided with heat medium water bypass regulation between heating agent water pump and heat medium water steam heater Valve.
As preferably: described heat medium water steam heater is provided with vapour source and steam control valve.
The beneficial effects of the utility model are:
1, the flue-gas temperature that can well control gas cooler outlet under the various operating condition of unit maintains in certain scope In, preferably ensure the efficiency of dust collection that electric cleaner is high.
2, under the various operating condition of unit, it is ensured that the cigarette temperature of flue gas heater outlet reaches to design requirement.
3, under the various operating condition of unit, the tube wall temperature of heat medium water pipe heat exchanger is at utmost ensured, it is to avoid flue gas cools down Device and the condensation of flue gas heater pipe wall of heat exchange pipe and corrosion.
4, the flue dust come because of the environment dust concentration higher band residing for gas cooler can be avoided to stick, dust stratification and fouling, impact is changed Hot side also deteriorates.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation;
Description of reference numerals: heat medium water water supply tank 1, heating agent water pump 2, A channel heat medium water inlet regulating valve 3, channel B heating agent Water inlet regulating valve 4, heat medium water bypass valve 5, gas cooler 6, heat medium water steam heater 7, flue gas heater 8, Vapour source 9, steam control valve 10.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described further.The explanation of following embodiment is only intended to help and understands this reality With novel.It should be pointed out that, for those skilled in the art, in the premise without departing from this utility model principle Under, it is also possible to this utility model is carried out some improvement and modification, and these improve and modification also falls into this utility model claim Protection domain in.
Outside the heat medium water pipe heat exchanger smoke abatement Gas Cooler 6 of the present embodiment and flue gas heater 8, it is made up of following aid system: Heat medium water water charging system, capital equipment includes heat medium water water supply tank 1, heat medium water blood circulation, capital equipment include heating agent water pump 2, Heat medium water steam heating system, capital equipment includes heat medium water steam heater 7 and corresponding adjusting control valve door, mainly includes A channel heat medium water inlet regulating valve 3, channel B heat medium water inlet regulating valve 4, heat medium water bypass valve 5 and steam control valve 10 compositions such as grade.
1 system signal with reference to the accompanying drawings, in unit starting, the different phase running and stop transport, heat medium water pipe heat exchanger is taked not Same control model.
In the unit starting stage, unit air-introduced machine completes the upper water conservancy project of heat medium water pipe heat exchanger and makees before starting.Before ignition of the boiler Preheating heat medium water, carries out tube wall intensification to gas cooler 6 and flue gas heater 8.Before ignition of the boiler, gas cooler 6 and flue gas heater 8 in heat medium water together circulate intensification, now gas cooler 6 exit water temperature is minimum, makes this point Water temperature is higher than flue gas acid dew point, can control the heating agent water temperature lower limit of whole system well.Standard-sized sheet A channel inlet regulating valve 3 can be passed through With channel B inlet regulating valve 4, fully closed heat medium water bypass valve 5, heat medium water bypass valve 5 is according to gas cooler 6 Outlet heat medium water temperature gradually adjusts and follows the tracks of, until temperature reaches design load.After ignition of the boiler, when flue-gas temperature is relatively low, Heat medium water and flue gas will occur heat exchange, and flue gas will take away partial heat, when the heating capacity of heat medium water steam heater 7 is enough, Use gas cooler 6 and flue gas heater 8 to circulate intensification simultaneously;Heating capacity at heat medium water steam heater 7 has in limited time, Gas cooler 6 being isolated, it is ensured that the tube wall temperature of flue gas heater 8, now flue gas heater 8 exit water temperature is minimum, This water temperature should be made higher than flue gas acid dew point, can control heat medium water temperature lower limit well.By fully closed A channel inlet regulating valve 3 and B Passage inlet regulating valve 4, standard-sized sheet heat medium water bypass valve 5, and gradually adjust heat medium water according to flue gas heater 8 exit water temperature The aperture of bypass valve 5 is also followed the tracks of, until temperature reaches design load.
The most warmed up to normally at unit normal operating phase, gas cooler 6 and flue gas heater 8 heat medium water.Flue gas cools down Device 6 exports cigarette temperature and rises, then open big A channel inlet regulating valve 3 and channel B inlet regulating valve 4, turns down heat medium water bypass and adjusts Joint valve 5;Gas cooler 6 exports cigarette temperature and declines, then turn down A channel inlet regulating valve 3 and channel B inlet regulating valve 4, Opening big heat medium water bypass valve 5, major control gas cooler 6 exports cigarette temperature in design load scope.Flue gas heater 8 goes out Mouth cigarette temperature rises, then turn down steam control valve 10;Otherwise anti-then, control flue gas heater 8 export cigarette temperature in scope of design.
In the unit outage stage, standard-sized sheet heat medium water bypass valve 5, fully closed A channel inlet regulating valve 3 and channel B water inlet are adjusted Joint valve 4, heating agent water pump 2 runs, and keeps the circulation of other system beyond smoke abatement Gas Cooler 6.Increase steam control valve 10 to open Degree, flue gas heater 8 heat medium water passes through steam heating and thermal insulation, and gas cooler 6 heat medium water then synchronizes to decline with cigarette temperature, until Boiler flameout.In the stages of not stopping transport such as generator set desulfurization absorption tower recirculation pumps, control flue gas heater 8 exports heating agent water temperature and is higher than Flue gas dew point temperature.The non-ignition phase of boiler in air flowing, keeps flue gas heater 8 to export heat medium water temperature and is slightly above cigarette Temperature.
Illustrate in conjunction with accompanying drawing 1 system, to heat medium water pipe heat exchanger system, mainly take following control thinking:
By A channel inlet regulating valve 3, channel B inlet regulating valve 4 and heat medium water bypass valve 5, regulate heat medium water flow The flue-gas temperature that gas cooler exports is controlled at certain temperature range;In the case of unit underload, pass through steam control valve The magnitude of recruitment of 10 regulation auxiliary steams, controls flue gas heater 8 exit gas temperature and reaches design load or control gas cooler 6 leaving water temperatures reach design load.Native system configuration logic is mainly the design of the regulating loop of 4 regulation valves.State respectively such as Under:
Heat medium water bypass valve 5:
First as gas cooler 6 regulates control, mainly controls the maximum caloric receptivity that gas cooler 6 can be accomplished, I.e. when A channel inlet regulating valve 3 and channel B inlet regulating valve 4 standard-sized sheet, gas cooler 6 reaches maximum caloric receptivity.It is opened Following principle is followed in degree setting: unit at full capacity time, heat medium water bypass valve 5 is fully closed, gas cooler 6 can be exported cigarette Temperature control is below flue gas dew point temperature.During minimum load, A channel inlet regulating valve 3 and channel B inlet regulating valve 4 are fully closed, Heat medium water bypass valve 5 standard-sized sheet, makes gas cooler 6 export cigarette temperature and is maintained at more than flue gas acid dew point temperature.Owing to A leads to The control object of road inlet regulating valve 3 and channel B inlet regulating valve 4 is also that gas cooler 6 exports cigarette temperature, for avoiding the occurrence of There is " intersect confusion " phenomenon with heat medium water bypass valve 5 in A channel inlet regulating valve 3 and channel B inlet regulating valve 4, When the initial stage of carrying out debugs, the valve position of heat medium water bypass valve 5 regulates with unit load as foundation.
A channel inlet regulating valve 3 and channel B inlet regulating valve 4:
Second as gas cooler 6 regulates control, mainly controls unit gas cooler 6 under different load operating mode Outlet cigarette temperature is in reasonable interval, and the regulation of relative first is the finest.When its regulation can not meet system condition, need to coordinate Heat medium water bypass valve 5 regulates gas cooler performance.
A channel inlet regulating valve 3 and channel B inlet regulating valve 4 mainly export the closed loop regulation of cigarette temperature with gas cooler 6, By regulation A channel inlet regulating valve 3 and the aperture of channel B inlet regulating valve 4, it is ensured that gas cooler 6 exports cigarette Wen Da To design load.For the hysteresis avoiding whole system to regulate, it is simultaneously introduced unit load and gas cooler 6 exports the actual measurement of cigarette temperature The temperature difference of value and setting value is as feedforward.
Steam control valve 10:
In the different phase of unit load, steam control valve 10 exports cigarette temperature according to flue gas heater 8, flue gas heater 8 exports Water temperature, heat medium water steam heater 7 inlet water temperature use different controlled plants.3 closed loop regulations of major design: with flue gas Heater 8 exports the closed loop regulation of cigarette temperature, and it is mainly by regulation steam control valve 10 aperture, it is ensured that flue gas heater 8 exports Cigarette temperature reaches design load, regulates with the closed loop of gas cooler 6 exit water temperature, and it is mainly by regulation steam control valve 10 aperture, Ensure that gas cooler 6 exit water temperature reaches design load;Regulating with the closed loop of flue gas heater 8 exit water temperature, it mainly passes through Regulation steam control valve 10 aperture, it is ensured that flue gas heater 8 exit water temperature reaches design load.
This utility model is applied at Zhejiang Zhe Nengjiahua electricity generating corporation, Ltd #3 unit~#8 unit, controls respond well.

Claims (2)

  1. null1. a heat medium water pipe heat exchanger control system,It is characterized in that: include gas cooler (6)、Flue gas heater (8)、Heat medium water water supply tank (1)、Heating agent water pump (2)、Heat medium water steam heater (7)、A channel heat medium water inlet regulating valve (3)、Channel B heat medium water inlet regulating valve (4)、Heat medium water bypass valve (5) and steam control valve (10),Described heat medium water water supply tank (1) is connected with flue gas heater (8) and heating agent water pump (2),Heating agent water pump (2) connects A channel heat medium water inlet regulating valve (3) and channel B heat medium water inlet regulating valve (4) respectively,A channel heat medium water inlet regulating valve (3) and channel B heat medium water inlet regulating valve (4) connect one group of gas cooler (6) respectively,Two groups of gas coolers (6) are connected to heat medium water steam heater (7),Described heat medium water steam heater (7) is then connected to flue gas heater (8),Heat medium water bypass valve (5) it is additionally provided with between heating agent water pump (2) and heat medium water steam heater (7).
  2. Heat medium water pipe heat exchanger control system the most according to claim 1, it is characterised in that: described heat medium water steam heater (7) is provided with vapour source (9) and steam control valve (10).
CN201620105192.7U 2016-02-01 2016-02-01 Hot media water tubular heat exchanger control system Active CN205607235U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201620105192.7U CN205607235U (en) 2016-02-01 2016-02-01 Hot media water tubular heat exchanger control system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105571381A (en) * 2016-02-01 2016-05-11 浙江天地环保工程有限公司 Control system and method for heat medium water pipe type heat exchanger
CN107023815A (en) * 2017-04-25 2017-08-08 广东电网有限责任公司电力科学研究院 The temprature control method of the indirect flue gas heat-exchange unit of 600MW coal-burning boilers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105571381A (en) * 2016-02-01 2016-05-11 浙江天地环保工程有限公司 Control system and method for heat medium water pipe type heat exchanger
CN107023815A (en) * 2017-04-25 2017-08-08 广东电网有限责任公司电力科学研究院 The temprature control method of the indirect flue gas heat-exchange unit of 600MW coal-burning boilers
CN107023815B (en) * 2017-04-25 2019-04-12 广东电网有限责任公司电力科学研究院 The temprature control method of the indirect flue gas heat-exchange unit of 600MW coal-burning boiler

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GR01 Patent grant
CP01 Change in the name or title of a patent holder
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Address after: Hangzhou City, Zhejiang province 310012 Huaxing Road No. 99 (Hangzhou Neusoft business building)

Co-patentee after: ZHEJIANG ZHENENG WENZHOU POWER GENERATION Co.,Ltd.

Patentee after: Zhejiang Tiandi Environmental Protection Technology Co., Ltd

Address before: Hangzhou City, Zhejiang province 310012 Huaxing Road No. 99 (Hangzhou Neusoft business building)

Co-patentee before: ZHEJIANG ZHENENG WENZHOU POWER GENERATION Co.,Ltd.

Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.