CN104654340A - Tubular GGH (gas-gas heater) system for thermal power plant - Google Patents
Tubular GGH (gas-gas heater) system for thermal power plant Download PDFInfo
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- CN104654340A CN104654340A CN201510076109.8A CN201510076109A CN104654340A CN 104654340 A CN104654340 A CN 104654340A CN 201510076109 A CN201510076109 A CN 201510076109A CN 104654340 A CN104654340 A CN 104654340A
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Abstract
The invention discloses a tubular GGH (gas-gas heater) system for a thermal power plant. The thermal power plant comprises a condensed water system. The tubular GGH system comprises a smoke gas cooler, a smoke gas heater, heat medium water and a condensed water heat compensator, wherein the condensed water heat compensator comprises a condensed water inlet, a condensed water outlet, a heat medium water inlet and a heat medium water outlet, the smoke gas cooler is communicated with the heat medium water inlet through fluid, a steam heater is communicated with the heat medium water outlet through fluid, the heat medium water circularly flows among the smoke gas cooler, the condensed water heat compensator and the smoke gas heater, and in the condensed water system, condensed water in different temperatures can flow to the condensed water heat compensator through the condensed water inlet, so that the heat medium water is heated or cooled, and then flows to the condensed water system through the condensed water outlet. The tubular GGH system has the advantages that the structure is simple, the investment is reduced, the control and regulation modes are simple, and the energy saving effect is realized.
Description
Technical field
The present invention relates to field of thermal power, be specifically related to a kind of tubular type GGH system for thermal power plant.
Background technology
China's future economy social stability sustainable development, the guarantee of an urgent demand energy supply and the support of lower cost electric power.And the natural endowment of China's primary energy is many coals oily lean gas less, rich coal resources, 2000 meters is 5.6 trillion tons with shallow prediction coal resources, energy residue can be adopted raw coal in gross reserves and be accounted for 58.8%, coal accounts for China's total output of primary energy 75%, account for total quantity consumed 70%, determine that the using energy source general layout of China based on coal is by long-term existence.Based on the energy supply sustainable growth of coal electricity, also for the economic fast and stable development of China has competitiveness in the world, keeping rational development cost to provide necessary condition, is the inevitable outcome of China's energy resources natural endowment and industrialization development.
And coal-burning power plant exists the discharge of atmosphere pollution, domestic atmosphere pollution has become important environment and social concern.Therefore, the thermal power plant pollutant emission standard of China improves constantly, and national standard " fossil-fuel power plant atmospheric pollutant emission standard " GB13223-2011 requires that the dust emission of key area coal unit is lower than 20mg/m
3, sulfur dioxide is lower than 50mg/m
3, nitrogen oxide is lower than 100mg/m
3, the standard be strict.And the requirement of some areas standard is higher, clear stipulaties in such as " Zhejiang Province's prevention and control of air pollution action plan ", before the end of the year 2017, all newly-built, flue gas must be adopted to clean draining technology building fired power generating unit, existing more than 600,000 kilowatts fired power generating unit substantially complete flue gas and clean draining technology transformation, and flue dust reaches 5mg/m
3, sulfur dioxide reaches 35mg/m
3, nitrogen oxide reaches 50mg/m
3discharge standard.And National Development and Reform Committee, Chinese Ministry of Environmental Protection, National Energy Board also dispatch a joint document " coal electricity energy-saving and emission-reduction upgrading and transformation action plan ", require " the eastern region newly-built Thermal generation unit Air Pollutant Emission concentration such as (Liaoning, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan 11 provinces and cities) reaches gas turbine group emission limit (namely under benchmark oxygen content 6% condition, flue dust, sulfur dioxide, discharged nitrous oxides concentration is not respectively higher than 10,35,50 milligrams/cubic metre) substantially ".
Above-mentioned is all that the flue-gas cleaning devices of coal fired power generation proposes new requirement.
Tubular type GGH technology can improve final exhaust gas temperature, eliminates " white cigarette " problem (gypsum rain carries) of wet stack; Low low temperature electrostatic deduster technology can improve the efficiency of deduster further, and the combination of above-mentioned technology can be applied in many new power plant construction and existing power plant environmental transformation engineering, is a kind of conventional technological means.
For low low temperature electrostatic deduster technology, require that entrance flue gas temperature controls, between 85 ~ 95 DEG C, just can effectively reduce dust specific resistance, thus the more effective advantage playing low low temperature electrostatic deduster.For tubular type GGH technology, domestic conventional flue gas heater adopts metal material (Japanese technology school, Germany technology school adopts acidproof fluoroplastics, price is high, domestic application is less), inevitably there is corrosion risk, the heat medium water temperature flowing through flue gas heater must control more than 70 DEG C by requirement.
In engineering, under average ambient temperature conditions and at full capacity during operating mode, the flue-gas temperature about 125 ~ 130 DEG C of boiler air preheater outlet, after gas cooler, temperature is reduced to about 85 ~ 95 DEG C, temperature drop about about 30 DEG C; Flue gas is after wet desulphurization device, and temperature is reduced to about 50 DEG C, is heated to about 80 through flue gas heater, and the temperature general control of heat medium water is in 70 ~ 100 (or 110) DEG C interval, and the heat of itself can balance substantially.But be subject to the change of environment temperature and the change of load, above-mentioned temperature range is difficult to ensure.
For example, under summer operating mode, environment temperature can rise to 35 ~ 40 DEG C, the exhaust gas temperature of air preheater outlet will rise to about 140 ~ 150 DEG C, by the impact of heat exchange difference, flue-gas temperature cannot be reduced to 85 ~ 95 DEG C by gas cooler, and conventional scheme can take the mode of sacrificing dust collector efficiency, namely keeping system is constant, makes the flue-gas temperature of gas cooler entrance be reduced to about 110 ~ 120 DEG C.And in the winter time and under running on the lower load, especially, under unit starting condition, the exhaust gas temperature of air preheater outlet is lower, minimumly may be reduced within 100 DEG C, can not ensure that heat medium water temperature is higher than 70 DEG C, needs by adding the thermal source heat compensations such as auxiliary steam in systems in which.
In sum, tubular type GGH system combines with low low temperature electrostatic deduster technology, is a kind of very practical green technology, but affected by environment and unit load changing factor, and there is certain defect, needs carry out supplementary and perfect.
Summary of the invention
The object of this invention is to provide a kind of tubular type GGH system, to improve the tubular type GGH system combined with low low temperature electrostatic deduster technology.
For achieving the above object, according to an aspect of the present invention, provide a kind of tubular type GGH system, for thermal power plant, described thermal power plant comprises condensate system, it is characterized in that, described tubular type GGH system comprises gas cooler, flue gas heater, heat medium water, and condensate water expansion loop, wherein, described condensate water expansion loop comprises condensate water entrance, condensate water exports, heat medium water entrance and heat medium water outlet, described gas cooler is communicated with described heat medium water inlet fluid, described steam heater is communicated with described heat medium water outlet fluid, heat medium water is at described gas cooler, circulate between condensate water expansion loop and flue gas heater, in described condensate system, the condensate water of different temperatures can flow to described condensate water expansion loop by described condensate water entrance, thus described heat medium water is heated or cools, and then by described condensate water outlet flow to described condensate system.
Preferably, described tubular type GGH system also comprises condensate water booster pump, and this condensate water booster pump is between described condensate system and described condensate water expansion loop.
Preferably, described condensate system comprises condensate pump and multiple low heater, described tubular type GGH system and described condensate system are by the first branch road, second branch road, first total road, second total road connects, wherein, a part for the condensate water flowed out from described condensate pump flows to first total road via the first branch road and flows to described condensate water expansion loop via first total road again, and a part for condensate water after at least one low heater heating flows to first total road via the second branch road and flows to described condensate water expansion loop via first total road again, described first branch road is provided with the first valve and is provided with the second valve on described second branch road, the condensate water flowed out from described condensate water expansion loop flows back to described condensate system via second total road.
Preferably, described multiple low heater is first, second, third and the 4th low heater, described first branch road one end is connected on the pipeline between described condensate pump and described primary heater, one end of described second branch road is connected on the pipeline between described 3rd heater and described 4th heater, and the one end on described second total road is connected on the pipeline between described second low heater and described 3rd heater.
Preferably, described thermal power plant comprise boiler, empty neck device, except layer device and absorption tower, wherein, the flue gas flowed out from described empty neck device flows through described gas cooler, and flow to described deduster again after being cooled in this gas cooler, from described flue gas flow direction absorption tower of flowing out except layer device, the flue gas flowed out from described absorption tower flows through described flue gas heater and gets rid of from smokestack after being heated described flue gas heater.
Preferably, described thermal power plant also comprises air-introduced machine, and this air-introduced machine is between described deduster and described absorption tower.
Preferably, described tubular type GGH system also comprises heating agent water pump, and this heating agent water pump is between described gas cooler and described flue gas heater and be communicated with described flue gas heater fluid with described gas cooler.
According to a further aspect in the invention, provide a kind of tubular type GGH system, this tubular type GGH system is used for thermal power plant, this thermal power plant comprises condensate system, boiler, empty neck device, except layer device and absorption tower, described condensate system comprises condensate pump and multiple low heater, described condensate pump is communicated with described multiple low heater fluid, in described condensate system, the condensate water of different temperatures can flow to described condensate water expansion loop by described condensate water entrance, thus described heat medium water is heated or cools, and then by described condensate water outlet flow to described condensate system, described tubular type GGH system comprises gas cooler, heat medium water, flue gas heater and condensate water expansion loop, and wherein, heat medium water circulates between described gas cooler, condensate water expansion loop and flue gas heater, and the flue gas to flow out from described empty neck device flows into described gas cooler via described first smoke inlet and cools this gas cooler, flow out via described first exhanst gas outlet again, then layer device is removed and dedusting in this deduster described in flowing into, flue gas after dedusting flows into described absorption tower, and the flue gas flowed out from described absorption tower flows into described flue gas heater via described second smoke inlet and heated in this heater.
Preferably, described total road is provided with condensate water booster pump.
Preferably, described tubular type GGH system also comprises heating agent water pump, and this heating agent water pump is between described gas cooler and described flue gas heater.
Tubular type GGH system construction of the present invention is simple, and investment comparatively economizes, and control and regulative mode simply, and with the auxiliary steam that condensate water (being equivalent to lower the drawing gas of quality) replaces quality higher, have energy-saving effect.
Accompanying drawing explanation
Fig. 1 is tubular type GGH systematic difference schematic diagram of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing, preferred embodiment of the present invention is described in detail, so that clearer understanding objects, features and advantages of the present invention.It should be understood that embodiment shown in the drawings is not limitation of the scope of the invention, and the connotation just in order to technical solution of the present invention is described.
Term illustrates:
Flue gas acid dew point: the adiabatic condensation temperature of sulfureous in flue gas acid vapor, is called flue gas acid dew point, also referred to as flue gas dew point temperature.In coal unit, flue gas acid dew point is important parameter, and routine is thought, namely can produce corrosion lower than flue gas acid dew point, and therefore, the design and operation temperature of General Requirements flue gas is higher than acid dew point more than 10 DEG C.
Tubular type GGH system: GGH is gas gas heater, it is one of main device in flue gas desulphurization system, its effect utilizes former flue gas to be heated by the neat stress after desulfurization, exhaust gas temperature is made to reach on dew point, alleviate the corrosion to flue and chimney, improve the diffusance of pollutant, eliminate " white smoke pollution "; Reduce the flue-gas temperature entering absorption tower simultaneously, reduce chimney to corrosion-resistant process specifications.GGH due to routine is swinging, there is fume side to leak, desulfuration efficiency is caused to decline, can not meet the SO2 discharge standard of requirements at the higher level, present part power plant tubular type GGH replaces, by intermediate medium (heat medium water), by former flue gas and neat stress heat exchange, function is with conventional GGH, and technology rises in Japan and Germany, also referred to as: " No leakage formula GGH ".Tubular type GGH is divided into the gas cooler of former fume side and the flue gas heater of neat stress side.
Ratio resistance: ratio resistance is used to the physical quantity representing various material resistance characteristic.The resistance of the length 1 meter that certain material is made, the wire of cross-sectional area 1 square millimeter (when 20 DEG C) at normal temperatures, is called the ratio resistance of this material.The factor such as length, cross-sectional area of ratio resistance and conductor has nothing to do, and is the electrical properties of conductor material itself, is determined by the material of conductor, and relevant with temperature.Ratio resistance is the key factor affecting electrostatic precipitator efficiency.
Low low temperature electrostatic deduster: conventional electrostatic precipitator flue-gas temperature higher than acid dew-point temperature, and retains certain nargin.The electrostatic precipitator run lower than acid dew-point temperature is called low low temperature electrostatic deduster by Japanese firm.Its theory is thought, before deduster, flue-gas temperature is lower than acid dew-point temperature, and the sulfuric acid of formation can be wrapped up by the alkali metal in flying dust, can not form corrosion.The flue-gas temperature of low low temperature electrostatic deduster import is about 85 ~ 95 DEG C.Low temperature dedusting technology proposes under reduction fly ash resistivity prerequisite, and it effectively can prevent electric cleaner generation inverse corona, improves efficiency of dust collection, and due to the reduction of temperature, flue gas volume flow is reduced, the efficiency of raising electrostatic precipitator.Low low temperature electrostatic deduster technology can with tubular type GGH combine with technique, the gas cooler of tubular type GGH is arranged in low low temperature electrostatic deduster porch, the flue-gas temperature of deduster entrance can be reduced.At present, low low temperature electrostatic deduster technology is promoted at home widely.
Below in conjunction with Fig. 1, tubular type GGH system of the present invention is described.
Fig. 1 is tubular type GGH systematic difference schematic diagram of the present invention.As shown in Figure 1, tubular type GGH system comprises gas cooler 21, heating agent water pump 22, flue gas heater 23 and condensate water expansion loop 24.Wherein, gas cooler 21 comprises the first smoke inlet 211, first exhanst gas outlet 212, first heat medium water outlet 213 and the first heat medium water entrance 214, flue gas heater 23 comprises the second smoke inlet 231, second exhanst gas outlet 232, second heat medium water outlet 233 and the second heat medium water entrance 234, and condensate water expansion loop 24 comprises condensate water entrance 241, condensate water outlet 242, heat medium water entrance 243 and heat medium water outlet 244.
Gas cooler 21, heating agent water pump 22 and flue gas heater 23 are connected successively by main road 40.Main road 40 is provided with shunt 41, and condensate water expansion loop 24 is positioned in shunt 41.In the present embodiment, main road is provided with valve 04, shunt is provided with valve 03,05.In main road 40 and shunt 41, heat medium water (not shown) is all housed.
As shown in the arrow 42 in Fig. 1.When valve 4 is opened, when valve 5, valve 3 are closed, heat medium water flows out gas cooler 21 from the first heat medium water outlet 213, the second heat medium water entrance 234 of flue gas heater 23 is flow to via main road 40, after flue gas being heated in flue gas heater 23, flow out flue gas heater 23 from the second heat medium water outlet 233.The heat medium water flowed out from flue gas heater 23 is by heating agent water pump 22, and the first heat medium water entrance 214 via gas cooler 21 flows back to gas cooler 21, completes and once circulates.
When valve 4 is closed, when valve 5 and valve 3 are opened, heat medium water flows out gas cooler 21 from the first heat medium water outlet 213, branch road 41 is flow to via main road 40, flow in condensate water expansion loop 24 from heat medium water entrance 243 again, in condensate water expansion loop 24, this heat medium water is heated or cooled (this depends on the temperature of the condensate water flowed in condensate water expansion loop 24, hereafter will describe in detail).The heat medium water flowed out via heat medium water outlet 244 from condensate water expansion loop 24 flows into flue gas heater 23 by the second heat medium water entrance 234, after heating, flows out flue gas heater 23 from the second heat medium water outlet 233 in flue gas heater 23 to flue gas.The heat medium water flowed out from flue gas heater 23 is by heating agent water pump 22, and the first heat medium water entrance 214 via gas cooler 21 flows back to gas cooler 21, completes and once circulates.
As shown in Figure 1, after from boiler 11, flue gas out flows through sky neck device 12, gas cooler 21 is flowed into from the first smoke inlet 211, in gas cooler 21 after cooling, flow into deduster 13 again, after the flue gas flowed out from deduster 13 flows through air-introduced machine (or booster fan) 14, stream is as absorption tower 15.The flue gas flowed out from absorption tower 15 flows into flue gas heater 23 through the second exhanst gas outlet 232 and is heated flue gas heater 23, and then gets rid of via smokestack (not shown).
As shown in Figure 1, condensate system comprises generator 31, turbine low pressure cylinder 32, condenser 33, condensate pump 34 and multiple low heater.In the present embodiment, the plurality of low heater is four, is respectively the low heater 36 of the first low heater 35, second, the 3rd low heater 37 and the 4th low heater 38.But, those skilled in the art will appreciate that the plurality of low heater also can be unnecessary 4 or be less than 4.
The condensate water flowed out from turbine low pressure cylinder 32 flow to water supply system (not shown) through condenser 33, the low heater 36 of condensate pump the 34, first low heater 35, second, the 3rd low heater 37 and the 4th low heater 38 successively.Wherein, be about 35 DEG C from the temperature of the condensate water of condensate pump 34 outflow, be about 61 DEG C from the temperature of the condensate water of the first low heater 35 outflow, be about 85 DEG C from the temperature of the condensate water of the second low heater 36 outflow, be about 124 DEG C from the temperature of the condensate water of the 3rd low heater 37 outflow, be about 157 DEG C from the temperature of the condensate water of the 4th low heater 38 outflow.
Be communicated with the second branch road 53 fluid by first total road 51, first, total road 50, second branch road 52 between condensate system with condensate water expansion loop 24.One end of first branch road 52 is connected on the pipeline between condensate pump 34 and the first low heater 35, and one end of the second branch road 53 is connected on the pipeline between the 3rd low heater 37 and the 4th low heater 38.The other end of the first branch road 52 and the second branch road 53 is all connected to the one end on first total road 50, the other end on first total road 50 is communicated with condensate water entrance 241 fluid of condensate water expansion loop 24, and the condensate water outlet 242 of condensate water expansion loop 24 is connected on the pipeline between the second low heater 37 and the 3rd low heater 38 by second total road 51.First branch road 52 and the second branch road 53 are respectively equipped with valve 01 and valve 02.
The operation of tubular type GGH system of the present invention is below described with two kinds of operating modes respectively.
The first, summer or the higher operating mode of flue-gas temperature
Under summer or the higher operating mode of flue-gas temperature, because environment temperature is too high, the exhaust gas temperature in air preheater 12 exit will rise to about 140 ~ 150 DEG C, now valve-off 02, open valve 01, the condensate water without too low heater 26 heating in condensate system flows into first total road 50 by the first branch road 52 and then flows into condensate water booster pump 25, by flowing into condensate water expansion loop 24 after condensate water booster pump 25 supercharging, after heat medium water being lowered the temperature in condensate water expansion loop 24, then flow back to condensate system by second total road 51.Now, condensate water expansion loop 24 uses as cooler.Due to the cooling effect of condensate water expansion loop 24 pairs of heat medium waters, the temperature of heat medium water is reduced, thus in the cyclic process of heat medium water, in gas cooler 21, the flue gas flowed out from empty neck device 12 is cooled, because the flue-gas temperature at the first exhanst gas outlet 212 place that this ensure that gas cooler 21 is controlled between 85 ~ 95 DEG C, and the flue-gas temperature leaving flue gas heater 23 controls more than 70 DEG C.
The second, unit startup stage, or winter, running on the lower load
Unit startup stage, or winter, running on the lower load, the exhaust gas temperature in air preheater 12 exit is lower, minimumly may be reduced within 100 DEG C, now valve-off 01, cuts off low-temperature condensate, Open valve 02, introduces condensed water in high temperature from condensate system.Condensed water in high temperature after the 3rd low heater 38 heats flows into first total road 50 by the second branch road 53, by flowing into condensate water expansion loop 24 after condensate water booster pump 25 supercharging, after heat medium water being heated in condensate water expansion loop 24, flow back to condensate system by second total road 51 again, now condensate water heat compensation device 24 uses as heater.Being flowed out from heat medium water outlet 244 by the heat medium water heated in condensate water expansion loop 24, via 41 flowing back to main road 42 along separate routes, then flowing into flue gas heater 23 via the second heat medium water entrance 234 further.Because heat medium water is heated in condensate water expansion loop 24, therefore, heat medium water can flow into the flue gas of flue gas heater 23 to more than 70 DEG C by via the second smoke inlet 232 in flue gas heater 23.
Although it should be understood that in the above-described embodiments, one end of the first branch road 52 is connected on the pipeline between condensate pump 34 and the first low heater 35, and one end of the second branch road 53 is connected on the pipeline between the 3rd low heater 37 and the 4th low heater 38.The condensate water outlet 242 of condensate water expansion loop 24 is connected on the pipeline between the second low heater 37 and the 3rd low heater 38 by second total road 51, but also can be following connected mode, namely one end of the first branch road is connected on the pipeline between the first low heater and the second low heater, and one end of the second branch road is connected on the pipeline between the 3rd low heater and the 4th low heater; Or first one end of branch road be connected on the pipeline between the first low heater and the second low heater, one end of the second branch road is connected on the pipeline in the 4th low heater downstream.
Because condensate water is with there is the larger temperature difference between heat medium water, in the present invention, condensate water adopts partial discharge, can by controlling to flow into the condensing water flow in condensate water heat compensation device, control the heat exchange amount with tubular type GGH system, reach the effect controlling gas cooler exit gas temperature and flow through flue gas heater heat medium water temperature.
The condensate water booster pump 25 arranged in native system, can reduce the impact on condensate system.Due to employing is water-water heat exchanger, only needs to consider certain end difference, heat exchange that can be two-way.In the present invention, condensate system is separated with tubular type GGH system, less on the impact of condensate system.Meanwhile, drawing gas quality due to condensate system heating employing will lower than auxiliary steam, compares existing auxiliary vapour heating, better can utilize the heat of unit.Native system only adopts condensate water namely to achieve heating and cooling double action, and system is relatively simple, and investment comparatively economizes, and controls simple.
Below described preferred embodiment of the present invention in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present invention, those skilled in the art can make various changes or modifications the present invention.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. a tubular type GGH system, for thermal power plant, described thermal power plant comprises condensate system, it is characterized in that, described tubular type GGH system comprises gas cooler, flue gas heater, heat medium water, and condensate water expansion loop, wherein, described condensate water expansion loop comprises condensate water entrance, condensate water exports, heat medium water entrance and heat medium water outlet, described gas cooler is communicated with described heat medium water inlet fluid, described steam heater is communicated with described heat medium water outlet fluid, heat medium water is at described gas cooler, circulate between condensate water expansion loop and flue gas heater, in described condensate system, the condensate water of different temperatures can flow to described condensate water expansion loop by described condensate water entrance, thus described heat medium water is heated or cools, and then by described condensate water outlet flow to described condensate system.
2. tubular type GGH system according to claim 1, is characterized in that, described tubular type GGH system also comprises condensate water booster pump, and this condensate water booster pump is between described condensate system and described condensate water expansion loop.
3. tubular type GGH system according to claim 1, it is characterized in that, described condensate system comprises condensate pump and multiple low heater, described tubular type GGH system and described condensate system are by the first branch road, second branch road, first total road is connected with second total road, wherein, a part for the condensate water flowed out from described condensate pump flows to first total road via the first branch road and flows to described condensate water expansion loop via first total road again, and a part for condensate water after at least one low heater heating flows to first total road via the second branch road and flows to described condensate water expansion loop via first total road again, described first branch road is provided with the first valve and is provided with the second valve on described second branch road, the condensate water flowed out from described condensate water expansion loop flows back to described condensate system via second total road.
4. tubular type GGH system according to claim 3, it is characterized in that, described multiple low heater is first, second, third and the 4th low heater, described first branch road one end is connected on the pipeline between described condensate pump and described primary heater, one end of described second branch road is connected on the pipeline between described 3rd heater and described 4th heater, and the one end on described second total road is connected on the pipeline between described second low heater and described 3rd heater.
5. tubular type GGH system according to claim 1, it is characterized in that, described thermal power plant comprise boiler, empty neck device, except layer device and absorption tower, wherein, the flue gas flowed out from described empty neck device flows through described gas cooler, and cooled in this gas cooler after flow to described deduster again, from described flue gas flow direction absorption tower of flowing out except layer device, the flue gas flowed out from described absorption tower flows through described flue gas heater and gets rid of from smokestack after being heated described flue gas heater.
6. tubular type GGH system according to claim 1, is characterized in that, described thermal power plant also comprises air-introduced machine, and this air-introduced machine is between described deduster and described absorption tower.
7. tubular type GGH system according to claim 1, it is characterized in that, described tubular type GGH system also comprises heating agent water pump, and this heating agent water pump is between described gas cooler and described flue gas heater and be communicated with described flue gas heater fluid with described gas cooler.
8. a tubular type GGH system, this tubular type GGH system is used for thermal power plant, and this thermal power plant comprises condensate system, boiler, empty neck device, except layer device and absorption tower, it is characterized in that:
Described condensate system comprises condensate pump and multiple low heater, described condensate pump is communicated with described multiple low heater fluid, in described condensate system, the condensate water of different temperatures can flow to described condensate water expansion loop by described condensate water entrance, thus heat described heat medium water or cool, and then by described condensate water outlet flow to described condensate system;
Described tubular type GGH system comprises gas cooler, heat medium water, flue gas heater and condensate water expansion loop, and wherein, heat medium water circulates between described gas cooler, condensate water expansion loop and flue gas heater; And
The flue gas flowed out from described empty neck device flows into described gas cooler via described first smoke inlet and cools this gas cooler, flow out via described first exhanst gas outlet again, then layer device is removed and dedusting in this deduster described in flowing into, flue gas after dedusting flows into described absorption tower, and the flue gas flowed out from described absorption tower flows into described flue gas heater via described second smoke inlet and heated in this heater.
9. tubular type GGH system according to claim 8, is characterized in that, it is characterized in that, described total road is provided with condensate water booster pump.
10. tubular type GGH system according to claim 8, is characterized in that, described tubular type GGH system also comprises heating agent water pump, and this heating agent water pump is between described gas cooler and described flue gas heater.
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| CN111001250A (en) * | 2019-12-23 | 2020-04-14 | 盐城工学院 | Improved low-low temperature electric precipitation desulfurization combined process |
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| CN204704836U (en) * | 2015-02-12 | 2015-10-14 | 中国电力工程顾问集团华东电力设计院有限公司 | For the tubular type GGH system in thermal power plant |
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| CN106277271A (en) * | 2016-08-26 | 2017-01-04 | 浙江天地环保科技有限公司 | A kind of tubular type heat medium water heat-exchange system chemicals dosing plant and control method thereof |
| CN111001250A (en) * | 2019-12-23 | 2020-04-14 | 盐城工学院 | Improved low-low temperature electric precipitation desulfurization combined process |
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