CN205299567U - Energy -conserving low dust discharges coal -fired thermal power system - Google Patents
Energy -conserving low dust discharges coal -fired thermal power system Download PDFInfo
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- CN205299567U CN205299567U CN201520397435.4U CN201520397435U CN205299567U CN 205299567 U CN205299567 U CN 205299567U CN 201520397435 U CN201520397435 U CN 201520397435U CN 205299567 U CN205299567 U CN 205299567U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to an energy -conserving low dust discharges coal -fired thermal power system, including boiler, desulfurizing tower and electrostatic precipitator, its characterized in that: arrange the waste heat recovery system in the updrift side of desulfurizing tower, arrange the dust pelletizing system behind the desulfurizing tower, or arrange the waste heat recovery system in the updrift side of desulfurizing tower, perhaps arrange the dust pelletizing system behind the desulfurizing tower, the waste heat recovery system is with the heat recovery in the boiler afterbody high temperature flue gas to in delivering to the steam turbine heater, realize the comprehensive utilization of flue gas waste heat through the extraction flow who saves the heater. The utility model provides an energy -conserving low dust discharges coal -fired thermal power system through waste heat recovery system and dust pelletizing system, reaches the most genuine clean the emission, and simple, reliable, high -efficient.
Description
Technical field
The utility model belongs to waste gas purification technical field, is specifically related to a kind of energy-conservation low dirt discharging fire coal thermal power generation system.
Background technology
China is typical coal big country, and domestic electric power is mainly taking coal-fired thermal power generation as main. By the end of the year 2013, China's capacity of installed generator breaks through 1,200,000,000 kilowatts, and wherein 8.62 hundred million kilowatts of thermoelectricitys, account for 69.13% of whole installed capacitys. And the installed capacity of coal electricity has reached 7.86 hundred million kilowatts. In haze serious Beijing-Tianjin Hebei and Shandong, Yangtze River Delta Area, in unit area, coal Denso machine is considerably beyond the Northwest, more than the air pollution emission of unit are is the several times of average national level.
" coal changes gas " aimed at the outlet of control atmosphere pollution at present in many cities, but is seriously limited by source of the gas deficiency. The output of Natural Gas In China in 2013 reaches 1210 billion cubic meters, and apparent consumption amount reaches 1692 billion cubic meters, and insufficiency of supply-demand exceedes 500 billion cubic meters; Consumption figure will reach 1860 billion cubic meters to estimate this year, inlet natural gas 630 billion cubic meters, and externally interdependency rises to 33.6%.
Although clean resources project constantly starts, but investigation energy structure in China, in disposable energy-consuming, coal still accounts for more than 70%, in generated energy, thermoelectricity generated energy still accounts for more than 70%, and coal is difficult to change with bearing in the important task significant period of time that ensures the stable supply of Chinese Energy Safety as the status of the main body energy.
At present, China national Bureau of Energy issues " coal electricity energy-saving and emission-reduction upgrading action plans (2014-2020) ", emphasis is made every effort to promote coal, renewal of the equipment is carried out in thermoelectricity field, technological transformation, there is further strict requirement for dust emission simultaneously, (Liaoning, eastern region, Beijing, Tianjin, Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, 11 provinces and cities such as Hainan) newly-built coal fired power generation unit Air Pollutant Emission concentration reaches gas turbine group emission limit substantially (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).
Aspect reduction of discharging, coal-burning power plant, in order to solve boiler smoke emission pollution problem, has taked a large amount of technical measures in recent years, reduces flue dust, SO2, the pollutant such as nitrogen oxide discharge, successively carry out setting up and transforming of electrostatic precipitator, flue gas desulphurization system (FGD), flue gas denitrification system (SCR), in current technology, Equipment Foundations, need further innovation but the issue of " coal electricity energy-saving and emission-reduction upgrading action plans (2014-2020) " means, strictly control the emission level of atmosphere pollution.
The exhaust gas temperature of station boiler is one of main performance index of boiler design, it affects the stifled ash of back-end surfaces, flue resistance and the air-introduced machine electric power consumption etc. that the flue gas low-temperature burn into smoke condensation of the thermal efficiency, boiler manufacture cost, the heated surface at the end of boiler of boiler causes, relates to economy and the security of boiler. Meanwhile, boiler exhaust gas heat loss accounts for the over half of boiler heat loss, and reducing heat loss due to exhaust gas by fume afterheat utilization is one of important channel reducing station boiler energy consumption. The exhaust gas temperature of tradition station boiler is between 120～140 DEG C, but the wet desulfurizing process of current extensive employing requires first flue-gas temperature to be reduced in desulfurizing tower by spray mode 50 DEG C of left and right, not only consume a large amount of power and water energy, and increase smoke discharge amount, aggravate the gypsum rain phenomenon of power plant's periphery, therefore from the viewpoint of energy-saving and emission-reduction and economy two, further reducing exhaust gas temperature becomes the inevitable choice of current station boiler energy-conserving and emission-cutting technology development.
Residual heat from boiler fume reclaimer is usually placed in the relatively low back-end ductwork of flue-gas temperature, adopt common stainless steel metal tubing matter, the easy dewfall of sulfuric acid vapor under this temperature conditions in flue gas and water vapour, after being attached to metal tube wall, can cause cold end corrosion and stifled grey problem, seriously limit the service life of equipment, reduced economy and the security of waste heat recovery. Although can alleviate cold end corrosion by the corrosion resistant special steel alloy material of employing, but still can not address this problem completely, simultaneously high cost and maintenance cost also reduce the economy of waste heat recovery greatly. In engineering for fear of cold end corrosion problem, more than generally the flue-gas temperature after waste heat recovery being maintained to acid dew point, normal conditions are minimum is selected in 90 DEG C of left and right, but compared with 50 DEG C of operating temperatures in desulfurizing tower, have a large amount of waste heats not obtain effective recycling, and flue gas still need the mode by consuming water and energy to realize cooling.
Therefore, reach clean discharge truly, need a kind of simple, reliable, efficient system to solve.
Utility model content
The utility model provides a kind of energy-conservation low dirt discharging fire coal thermal power generation system, by residual neat recovering system and dust pelletizing system, reaches clean discharge truly, and simple, reliable, efficient.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
(1) a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprise boiler, air preheater, blower fan, electrostatic precipitator and desulfurizing tower, it is characterized in that: the updrift side at desulfurizing tower is arranged residual neat recovering system, arranges dust pelletizing system after desulfurizing tower; Or arrange residual neat recovering system in the updrift side of desulfurizing tower; Or after desulfurizing tower, arrange dust pelletizing system.
(2) according to the energy-conservation low dirt discharging fire coal thermal power generation system (1) described, described residual neat recovering system, by the heat recovery in boiler tail high-temperature flue gas, by adding Hot gas turbine condensed water or feedwater, the heat of recovery is delivered among any one or any combination in following three: steam turbine low-pressure heater, turbine high-pressure heater and oxygen-eliminating device.
(3) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (2), described residual neat recovering system comprises nonmetal tubular type heat exchanger and contactless cooler, described nonmetal tubular type heat exchanger and contactless cooler composition enclosed water-flow circuit.
(4) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (3), and the heat that described nonmetal tubular type heat exchanger place reclaims is by directly or indirectly utilizing mode to add Hot gas turbine condensed water or feedwater.
(5) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (4), described nonmetal tubular type heat exchanger is arranged on flue, tube side is the recirculated water from contactless cooler outlet, the high-temperature flue gas that shell side is boiler tail.
(6) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (5), described contactless cooler is arranged between nonmetal tubular type heat exchanger and steam turbine heater or is arranged on the air channel between blower fan and air preheater, tube side is the recirculated water from nonmetal tubular type heat exchanger exit, shell side is the feedwater from condensed water or the heater of condenser, or is the cold wind from blower fan.
(7) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (6), is characterized in that: in described nonmetal tubular type heat exchanger, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness.
(8) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (7), is characterized in that: in described nonmetal tubular type heat exchanger, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
(9) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (8), it is characterized in that: described nonmetal tubular type heat exchanger entrance place flue-gas temperature scope is 1-200 DEG C, and exit flue-gas temperature scope is 1-140 DEG C.
(10) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (9), is characterized in that: described nonmetal tubular type heat exchanger shell pass porch flue gas flow scope is 10000-6000000Nm3/ h, tube side circulating water flow weight range is 10000-6000000kg/h.
(11) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (10), it is characterized in that: described nonmetal tubular type heat exchanger entrance place flue is divided into 9 regions, nonmetal tubular type heat exchanger requires the wind speed of regional in flue: the wind speed range in region 1 is 1-30m/s, the wind speed range in region 2 is 1-30m/s, the wind speed range in region 3 is 1-30m/s, the wind speed range in region 4 is 1-30m/s, the wind speed range in region 5 is 1-30m/s, the wind speed range in region 6 is 1-30m/s, the wind speed range in region 7 is 1-30m/s, the wind speed range in region 8 is 1-30m/s, the wind speed range in region 9 is 1-30m/s, the difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
(12) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (11), it is characterized in that: the outward appearance of described nonmetal tubular type heat exchanger is rectangle, and size range is: long 1-20 rice, wide 1-20 rice; Or outward appearance is circular, and size range is: radius 1-15 rice.
(13) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (12), is characterized in that: in described contactless cooler, recirculated water input temp scope is 1-50 DEG C; Output temperature scope is 1-100 DEG C.
(14) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (13), is characterized in that: the surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
(15) according to (1) to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (14), the described mode of directly utilizing is directly used in the feedwater of heating from condensed water or the heater of condenser for the waste heat reclaiming at noncontact cooler place.
(16) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (15), described indirect utilization mode be reclaim waste heat at contactless cooler place for heating cold wind, heat goes out to have the flue gas of high hot grade sending into air preheater rear substitution, and uses the flue gas of this high hot grade from the feedwater of condensed water or the heater of condenser.
(17) according to the energy-conservation low dirt discharging fire coal thermal power generation system of (16), it is characterized in that: described directly to utilize in mode input gas temperature scope in nonmetal tubular type heat exchanger be 100-200 DEG C, exit gas temperature scope is 60-140 DEG C, and flue gas flow scope is 50000-6000000Nm3/ h; Recirculated water input temp scope is 30-60 DEG C, and output temperature scope is 40-100 DEG C, and range of flow is 20000-6000000kg/h; In contactless cooler, condensed water or feedwater input temp scope are 10-50 DEG C, and output temperature scope is 30-100 DEG C, and range of flow is 20000-6000000kg/h.
(18) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (17), displacement has high hot grade flue gas and comprises two kinds of implementation methods, implementation method one is for gas bypass is set before air preheater gas approach, and under the prerequisite that does not change air preheater import and export flue-gas temperature parameter, separating part flue gas is for heating the feedwater from condensed water or the heater of condenser; Implementation method two is for improving the high-temperature flue-gas of air preheater outlet, for directly heating the feedwater from condensed water or the heater of condenser.
(19) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (18), described implementation method one is arranged gas bypass outlet before air preheater import, before electrostatic precipitator import, arrange that gas bypass imports mouth, arranges high-temperature heat-exchanging and mid temperature heat exchanger on gas bypass.
(20) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (19), and described implementation method two arranges mid temperature heat exchanger on the flue between air preheater and electrostatic precipitator.
(21) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (20), described high temperature and mid temperature heat exchanger tube side are the feedwater from condensed water or the heater of condenser, and shell side is high-temperature flue gas.
(22) according to the energy-conservation low dirt discharging fire coal thermal power generation system of (21), it is characterized in that: in described implementation method one, the high hot grade flue-gas temperature scope of gas bypass outlet is 200-400 DEG C, gas bypass remittance entrance flue gas temperature scope is 90-150 DEG C, and flue gas flow scope is 10000-2000000Nm3/ h; It is 130-260 DEG C that high-temperature heat-exchanging, mid temperature heat exchanger input to coolant-temperature gage scope, and exporting to coolant-temperature gage scope is 150-300 DEG C, and feedwater flow scope is 20000-6000000kg/h.
(23) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (22), and described high-temperature heat-exchanging tube side is the feedwater from condensed water or the heater of condenser, and shell side is high-temperature flue gas.
(24) according to the energy-conservation low dirt discharging fire coal thermal power generation system of (23), it is characterized in that: in described implementation method two, mid temperature heat exchanger input gas temperature scope is 140-200 DEG C, exit gas temperature scope is 90-140 DEG C, and flue gas flow scope is 50000-6000000Nm3/ h; Inputing to coolant-temperature gage scope is 30-120 DEG C, and exporting to coolant-temperature gage scope is 60-150 DEG C, and feedwater flow scope is 20000-6000000kg/h.
(25) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (24), described dust pelletizing system comprises liquid film deduster and cooler, described liquid film deduster and cooler composition closed cycle loop, in closed circuit recirculated water in liquid film deduster, absorb heat after in cooler to the heat release of low-temperature receiver water.
(26) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (25), and described liquid film deduster is arranged perpendicular to flue direction; Described contactless cooler is shell-and-tube heat exchanger, and tube side is recirculated water, and shell side is low-temperature receiver water.
(27) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (26), the water inlet end of described liquid film deduster is communicated with liquid film deduster inlet channel, and the water side of described liquid film deduster is communicated with liquid film deduster outlet conduit; The thermal source water inlet end of described contactless cooler is communicated with liquid film deduster outlet conduit, and the thermal source water side of described contactless cooler is communicated with liquid film deduster inlet channel; The low-temperature receiver water inlet end of described contactless cooler is communicated with cooler inlet channel, and the low-temperature receiver water side of described contactless cooler is communicated with cooler outlet conduit.
(28) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (27), it is characterized in that: in described liquid film deduster, recirculated water is demineralized water, in described contactless cooler, low-temperature receiver water is middle water or seawater.
(29) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (28), and in described liquid film deduster, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness.
(30) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (29), is characterized in that: in described liquid film deduster, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
(31) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (30), it is characterized in that: described liquid film deduster porch flue-gas temperature scope is 1-70 DEG C, and exit flue-gas temperature scope is 1-70 DEG C; Shell side flue gas flow scope is 10000-6000000Nm3/h。
(32) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (31), is characterized in that: in described liquid film deduster, low-temperature receiver water input temp is 1-50 DEG C; Output temperature is 1-60 DEG C, and range of flow is 20000-6000000kg/h.
(33) basis (1) is to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (32), it is characterized in that: described liquid film deduster porch flue is divided into 9 regions, liquid film deduster requires the wind speed of regional in flue: the wind speed range in region 1 is 1-20m/s, the wind speed range in region 2 is 1-20m/s, the wind speed range in region 3 is 1-20m/s, the wind speed range in region 4 is 1-20m/s, the wind speed range in region 5 is 1-20m/s, the wind speed range in region 6 is 1-20m/s, the wind speed range in region 7 is 1-20m/s, the wind speed range in region 8 is 1-20m/s, the wind speed range in region 9 is 1-20m/s, the difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
(34) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (33), is characterized in that: the outward appearance of described liquid film deduster is rectangle, and size range is: long 1-20 rice, wide 1-20 rice; Or outward appearance is circular, and size range is: radius 1-15 rice.
(35) basis (1), to the energy-conservation low dirt discharging fire coal thermal power generation system described in any one of (34), is characterized in that: the surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
The Committee of Development and Reform's on August 30th, 2013, up-to-date notice, carried out dust removal installation transformation, smoke dust discharge concentration lower than 30mg/m to employing new technology3(key area is lower than 20mg/m3), and suitably support through the fossil power plant dedusting cost of environmental administration's acceptance(check), electricity price compensation standard is 0.2 point of of every kilowatt hour.
Domestic nearly 400,000,000 kilowatts of units are not installed GGH, gypsum rain phenomenon ubiquity at present. Dust pelletizing system in energy-conservation low dirt discharging fire coal thermal power generation system of the present utility model adopts the indirect cooled flue gas of low-temperature receiver, can effectively remove drop/soot dust granule, comprehensive cost relatively low (approximately lower by 30% than wet-esp), and can thoroughly solve flue dust problem up to standard and gypsum rain phenomenon, effectively solve the problem such as obstruction, alluvial occurring due in the initiation solution such as impurity, microorganism film dust-remover pipe in recirculated water, greatly improved system reliability simultaneously. And water-saving result of the present utility model is obvious, expectation can bring 10%～20% water-saving result to power plant.
Residual neat recovering system in energy-conservation low dirt discharging fire coal thermal power generation system of the present utility model is taking nonmetal tubular type heat exchanger as core heat exchange module, can form different heats from various metals heat exchanger, realize efficient, the cascade utilization of power plant's high-temperature flue gas. Core heat exchange module has good corrosion-resistant, abrasion resistance properties, and heat exchange property efficiently can be realized for a long time, stablize, work reliably by acid dew point below. Fume afterheat advanced recycling system described in the utility model can be reduced to flue-gas temperature before desulfurization 70 DEG C of left and right, has greatly improved the potentiality of flue gas waste heat recovery, has reduced exhaust gas volumn, has effectively reduced air-introduced machine power consumption and desulfurization water consumption and power consumption; Native system, by scientifically organizing UTILIZATION OF VESIDUAL HEAT IN mode, can promote UTILIZATION OF VESIDUAL HEAT IN energy level simultaneously, realizes the efficient utilization of waste heat by adding Hot gas turbine feedwater.
In addition, system of the present utility model also has the advantages such as simple, reliable, efficient. The application's Application and Development can drive more than 20,000,000,000 industry developments, has important research meaning and value.
Brief description of the drawings
Fig. 1 is the structural representation that only comprises the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 2 is the structural representation that only comprises a kind of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 3 is the structural representation that only comprises two kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 4 is three kinds of example structure schematic diagrames that only comprise the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 5 is the structural representation that only comprises four kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 6 is the structural representation that only comprises five kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 7 is the structural representation that only comprises six kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 8 is the structural representation that only comprises seven kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Fig. 9 is the structural representation that only comprises eight kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Figure 10 is the structural representation that only comprises nine kinds of embodiment of the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system;
Figure 11 is the structural representation that only comprises the energy-conservation low dirt discharging fire coal thermal power generation system of dust pelletizing system;
Figure 12 is the structural representation of dust pelletizing system;
Figure 13 comprises the energy-conservation low dirt discharging fire coal thermal power generation system of residual neat recovering system and the structural representation of dust pelletizing system.
Figure 14 is the cross section block plan of residual neat recovering system and liquid film dust pelletizing system import department flue.
Number in the figure: 1 is boiler, 2 is SCR denitrating tower, 3 is air preheater, 4 is electrostatic precipitator, 5 is air-introduced machine, 6 is booster fan, 7 is desulfurizing tower, 8 is chimney, 9 is blower fan, 10 is steam turbine heater, 11 is gland heater, 12 is condenser, 13 is turbine low pressure cylinder, 14 is Steam Turbine Through IP Admission, 15 is steam turbine high-pressure cylinder, 16 is nonmetal tubular type heat exchanger, 17 is residual heat system flush water pump, 18 is residual heat system circulating water pipeline, 19 is contactless cooler, 20 is residual heat system flushing water shower nozzle, 21 is liquid film deduster, 22 is condensate-scavenging installation, 23 is dust pelletizing system circulating water pipeline, 24 is dust pelletizing system wash tub pipe, 25 is contactless cooler, 27 is dust pelletizing system flushing water shower nozzle, 28 is oxygen-eliminating device, 29 is mid temperature heat exchanger, 30 is high-temperature heat-exchanging, 31 is mid temperature heat exchanger, 32 is condensing water conduit, 33 is artificial gaging hole, 34 is flue gas pressures meter, 35 is flue-gas temperature meter, 36 is dust pelletizing system water circulating pump, 37 is deduster inlet channel, 38 is low-temperature receiver coolant-temperature gage meter, 39 is low-temperature receiver water pump, 40 is valve, 41 is electromagnetic flowmeter, 42 is low-temperature receiver water outlet conduit, 43 is deduster leaving water temperature meter, 44 is deduster outlet conduit.
Detailed description of the invention
In certain embodiments, " nonmetallic heat exchanger " refers to the special equipment for recovery boiler tail flue gas waste heat of making as material taking fluoroplastics or polybutene material, for shell-and-tube heat exchanger, in work, shell side medium is boiler tail high-temperature flue gas, tube side is recirculated water, middle water, condensate water or the demineralized water etc. of the desirable power plant of recirculated water. In work, porch flue-gas temperature scope is 1-200 DEG C, and exit flue-gas temperature scope is 1-140 DEG C; Inlet Temperature of Circulating Water scope is 1-50 DEG C, and outlet temperature scope is 1-100 DEG C.
In certain embodiments, " liquid film deduster " refer to make taking fluoroplastics or polybutene material as material for removing the dust of flue gas after desulfurization and the special equipment of gypsum particle, for shell-and-tube heat exchanger, in work, shell side medium is boiler tail flue gas, tube side is low-temperature receiver water, middle water, condensate water, demineralized water or the seawater etc. of the desirable power plant of low-temperature receiver water, wherein have silt, algae or other foreign material when wherein low-temperature receiver water is seawater, now water intake system need arrange filtration facility. In work, liquid film deduster porch flue-gas temperature scope is 1-70 DEG C, and exit flue-gas temperature scope is 1-70 DEG C; Low-temperature receiver water inlet temperature range is 1-50 DEG C, and outlet temperature scope is 1-60 DEG C.
In certain embodiments, " high-temperature flue gas " refers to the flue gas between air preheater outlet and desulfurizing tower import in boiler back end ductwork, and temperature range is between 1-200 DEG C, and range of flow is 10000-6000000Nm3/ h, flow rates is 1-20m/s; In this high-temperature flue gas, contain multiple coal combustion product, as water vapour, nitrogen oxide, sulfur dioxide, sulfur trioxide, and other material is as mercury, dust etc.
In certain embodiments, " high hot grade flue gas " refers to the flue gas between economizer exit and air preheater import in boiler back end ductwork, and temperature range is between 200-400 DEG C, and range of flow is 10000-6000000Nm3/ h, flow rates is 1-30m/s; The hot grade flue gas of this height has multiple coal combustion product equally, and as water vapour, nitrogen oxide, sulfur dioxide, sulfur trioxide, and other material is as mercury, dust etc., is flue of living in position and temperature with high-temperature flue gas difference in literary composition.
Embodiment 1
As shown in Figure 2, a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprise boiler 1, SCR denitrating tower 2, air preheater 3, electrostatic precipitator 4, air-introduced machine 5, booster fan 6, desulfurizing tower 7, chimney 8, arrange residual neat recovering system in the updrift side of desulfurizing tower 7. Described residual neat recovering system comprises steam turbine module, nonmetal tubular type heat exchanger 16, residual heat system flush water pump 17, residual heat system circulating water pipeline 18, contactless cooler 19 and residual heat system flushing water shower nozzle 20. Described steam turbine module comprises oxygen-eliminating device 28, gland heater 11, condenser 12, turbine low pressure cylinder 13, Steam Turbine Through IP Admission 14, steam turbine high-pressure cylinder 15 and heater at different levels (as 1# in figure, 2# etc.). Described nonmetal tubular type heat exchanger 16 is arranged on the flue between booster fan 6 and desulfurizing tower 7, and described nonmetal tubular type heat exchanger 16 tube sides are the recirculated water exporting from contactless cooler 19, the high-temperature flue gas that shell side is boiler tail. Contactless cooler 19 is set between nonmetal tubular type heat exchanger 16 and steam turbine heater, and described contactless cooler 19 forms enclosed water-flow circuit with nonmetal tubular type heat exchanger 16. The tube side of contactless cooler 19 is the recirculated water exporting from nonmetal tubular type heat exchanger 16, and shell side is the feedwater of drawing from steam turbine 8# low-pressure heater.
When work, high-temperature flue gas is cooled at nonmetal tubular type heat exchanger 16 places, and the fume afterheat that recirculated water carries recovery flows to contactless cooler 19. The condensed water of drawing from the import of 8# low-pressure heater is heated in the time flowing through contactless cooler 19, and heated condensed water imports in 6# steam turbine low-pressure heater. Thereby saved the steam in 7#, 8# heater, the electrical power that the steam of being saved has improved system after steam turbine acting, has realized the utilization of fume afterheat.
In described nonmetal tubular type heat exchanger 16, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness. The surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
In described nonmetal tubular type heat exchanger 16, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
In described nonmetal tubular type heat exchanger 16, input gas temperature is 100-200 DEG C, and exit gas temperature is 60-140 DEG C; Recirculated water input temp is 30-60 DEG C, and output temperature is 40-100 DEG C; In contactless cooler 19, condensed water or feedwater input temp are 10-50 DEG C, and output temperature is 30-100 DEG C.
Described nonmetal tubular type heat exchanger 16 porch flue gas flow scopes are 10000-6000000m3/h。
Described nonmetal tubular type heat exchanger 16 porch flues are divided into 9 regions (as shown in figure 14), nonmetal tubular type heat exchanger 16 requires the wind speed of regional in flue: the wind speed range in region 1 is 1-30m/s, the wind speed range in region 2 is 1-30m/s, the wind speed range in region 3 is 1-30m/s, the wind speed range in region 4 is 1-30m/s, the wind speed range in region 5 is 1-30m/s, the wind speed range in region 6 is 1-30m/s, the wind speed range in region 7 is 1-30m/s, the wind speed range in region 8 is 1-30m/s, and the wind speed range in region 9 is 1-30m/s; The difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
The apparent size scope of described nonmetal tubular type heat exchanger 16 is rectangle: long 1-20 rice, wide 1-20 rice; Circular: radius 1-15 rice.
Embodiment 2
As shown in Figure 3, the residual neat recovering system of the present embodiment is set up identical with embodiment 1 at nonmetal tubular type heat exchanger 16 and the cloth of contactless cooler 19, just condensed water is drawn from steam turbine 8# low-pressure heater, after being heated, sends into 7# low-pressure heater, has saved the steam in 8# heater.
Embodiment 3
As shown in Figure 4, the residual neat recovering system of the present embodiment is set up identical with embodiment 1, embodiment 2 at nonmetal tubular type heat exchanger 16 and the cloth of contactless cooler 19, just feedwater is drawn from steam turbine 7# low-pressure heater, after heated, send into 6# low-pressure heater, saved the steam in 7# heater.
Embodiment 4
As shown in Figure 5, a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprise boiler 1, SCR denitrating tower 2, air preheater 3, electrostatic precipitator 4, air-introduced machine 5, booster fan 6, desulfurizing tower 7, chimney 8, arrange residual neat recovering system in the updrift side of desulfurizing tower 7. Described residual neat recovering system comprises steam turbine module, nonmetal tubular type heat exchanger 16, residual heat system flush water pump 17, residual heat system circulating water pipeline 18, contactless cooler 19 and residual heat system flushing water shower nozzle 20. Described steam turbine module comprises oxygen-eliminating device 28, gland heater 11, condenser 12, turbine low pressure cylinder 13, Steam Turbine Through IP Admission 14, steam turbine high-pressure cylinder 15 and heater at different levels (as 1# in figure, 2# etc.).
Mid temperature heat exchanger 29 is arranged on the flue between air preheater 3 and electrostatic precipitator 4. The tube side of described mid temperature heat exchanger 29 is to export the feedwater of drawing from steam turbine 7# low-pressure heater, the high-temperature flue gas that shell side is boiler tail, and the oxygen-eliminating device 28 of steam turbine module is sent in feedwater after heat exchange. Nonmetal tubular type heat exchanger 16 is arranged on the flue between booster fan 6 and desulfurizing tower 7, and described nonmetal tubular type heat exchanger 16 tube sides are the recirculated water exporting from contactless cooler 19, the high-temperature flue gas that shell side is boiler tail. On air channel after pressure fan 9, arrange contactless cooler 19, described contactless cooler 19 forms enclosed water-flow circuit with nonmetal tubular type heat exchanger 16, the tube side of contactless cooler 19 is the recirculated water exporting from nonmetal tubular type heat exchanger 16, and shell side is the cold wind from blower fan. Recirculated water is the cold wind from pressure fan in contactless cooler 19 places heating, and after heat exchange, recirculated water is sent back in nonmetal tubular type heat exchanger 16.
Mid temperature heat exchanger 29 input gas temperatures are 140-200 DEG C, and exit gas temperature is 90-120 DEG C, and flue gas flow scope is 50000-6000000Nm3/ h; Inputing to coolant-temperature gage is 30-120 DEG C, and exporting to coolant-temperature gage is 60-150 DEG C, and feedwater flow scope is 20000-6000000kg/h.
When work, high-temperature flue gas is cooled at nonmetal tubular type heat exchanger 16 places, recirculated water carries the residual heat stream of recovery to contactless cooler 19, cold wind after pressure fan 9 is recycled water and is heated to send into air preheater 3 after uniform temperature, and the rising of cold wind temperature is risen the flue-gas temperature after air preheater 3. High-temperature flue gas after intensification drawn from 6# low-pressure heater entrance at mid temperature heat exchanger 29 places give water cooling, the heat that recovery is carried in feedwater imports in the feedwater of 5# heater outlet, thereby save the steam turbine steam in 5#, 6# heater, the electrical power that the steam of being saved has improved system after steam turbine acting, has realized the utilization of fume afterheat.
Embodiment 5
As shown in Figure 6, it is identical that the residual neat recovering system of the present embodiment and embodiment 4 are set up at the cloth of mid temperature heat exchanger 29, and just feedwater is drawn from steam turbine 6# low-pressure heater exit, after heated, sends into oxygen-eliminating device 14, has saved the steam of 5# heater.
Embodiment 6
As shown in Figure 7, the residual neat recovering system of the present embodiment is set up identical with embodiment 4, example 5 at the cloth of metallic recuperator 29, just feedwater is drawn from steam turbine 7# low-pressure heater exit, after heated, sends into 5# heater, has saved the steam turbine steam in 6# heater.
Embodiment 7
As shown in Figure 8, a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprise boiler 1, SCR denitrating tower 2, air preheater 3, electrostatic precipitator 4, air-introduced machine 5, booster fan 6, desulfurizing tower 7, chimney 8, arrange residual neat recovering system in the updrift side of desulfurizing tower 7. Described residual neat recovering system comprises steam turbine module, nonmetal tubular type heat exchanger 16, residual heat system flush water pump 17, residual heat system circulating water pipeline 18, contactless cooler 19 and residual heat system flushing water shower nozzle 20. Described steam turbine module comprises oxygen-eliminating device 28, gland heater 11, condenser 12, turbine low pressure cylinder 13, Steam Turbine Through IP Admission 14, steam turbine high-pressure cylinder 15 and heater at different levels (as 1# in figure, 2# etc.).
Gas bypass arranges that between SCR denitrating tower 2 and electrostatic precipitator 4, gas bypass import is arranged on the flue between SCR denitrating tower 2 and air preheater 3, and gas bypass exports on the flue between air preheater 3 and electrostatic precipitator 4. High-temperature heat-exchanging 30 is arranged in bypass flue inlet side, and tube side is the feedwater of drawing from steam turbine 3# inlet of high pressure heater, and shell side is high-temperature flue gas, after feedwater is heated, sends in boiler 1. Mid temperature heat exchanger 31 is arranged in bypass flue outlet side, and tube side is to export the feedwater of drawing from steam turbine 6# low-pressure heater, and shell side is high-temperature flue gas, after feedwater is heated, sends in the oxygen-eliminating device 14 of steam turbine module. Nonmetal tubular type heat exchanger 16 is arranged on the flue between booster fan 6 and desulfurizing tower 7, and nonmetal tubular type heat exchanger 16 tube sides are the recirculated water exporting from contactless cooler 19, the high-temperature flue gas that shell side is boiler tail. Contactless cooler 19 is arranged in the air channel place after pressure fan 9, and tube side is the recirculated water exporting from nonmetal tubular type heat exchanger 16, and shell side is the cold wind from blower fan. At the nonmetal tubular type heat exchanger 16 heated circulating water flows in place, through contactless cooler 19, for heating the cold wind after pressure fan 9, heated cold wind enters air preheater 3.
The high hot grade flue-gas temperature of gas bypass outlet is 200-400 DEG C, and gas bypass remittance entrance flue gas temperature is 90-150 DEG C, and flue gas flow scope is 10000-2000000Nm3/ h; It is 130-260 DEG C that high-temperature heat-exchanging 30, mid temperature heat exchanger 31 input to coolant-temperature gage, and exporting to coolant-temperature gage is 150-300 DEG C, and feedwater flow scope is 20000-6000000kg/h.
When work, high-temperature flue gas is cooled at nonmetal tubular type heat exchanger 16 places, and recirculated water carries the waste heat of recovery and delivers to respectively contactless cooler 19. Deliver to the waste heat of contactless cooler 19 parts for heating the cold wind from pressure fan 9, cold wind is delivered to air preheater 3 after heated. For keeping the temperature parameter of air preheat outlet flue gas and hot blast constant, on flue before air preheater 3, gas bypass is set, the flue gas of shunting is for heating the feedwater of drawing from 3#, the import of 5# heater respectively at high-temperature heat-exchanging 30, mid temperature heat exchanger 31 places, after feedwater is heated, import respectively the feedwater of 1#, 5# heater outlet, thereby save the steam turbine steam in 1#, 2#, 3# heater and 5# heater, improve the electrical power of system, realized the utilization of fume afterheat.
Embodiment 8
As shown in Figure 9, the residual neat recovering system of the present embodiment is set up identical with embodiment 7 at the cloth of heat exchanger, just in high-temperature metal heat exchanger, heated feedwater is drawn from the outlet of steam turbine 3# high-pressure heater, after heated, import 1# outlet feedwater, saved the steam turbine steam in 1#, 2# heater.
Embodiment 9
As shown in figure 10, the residual neat recovering system of the present embodiment is set up identical with embodiment 7, embodiment 8 at the cloth of heat exchanger, just in high-temperature metal heat exchanger, heated feedwater is drawn from the outlet of steam turbine 2# high-pressure heater, after heated, import the feedwater of 1# outlet heater, saved the steam turbine steam in 1# heater.
Embodiment 10
Shown in Figure 11,12, a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprises boiler 1, SCR denitrating tower 2, air preheater 3, electrostatic precipitator 4, air-introduced machine 5, booster fan 6, desulfurizing tower 7, chimney 8, in the rear layout dust pelletizing system of desulfurizing tower 7. Described dust pelletizing system comprises liquid film deduster 21 and contactless cooler 25, described liquid film deduster 21 and contactless cooler 25 form closed cycle loop, in closed circuit recirculated water after the interior heat absorption of liquid film deduster 21 in contactless cooler 25 to the heat release of low-temperature receiver water. In described liquid film deduster 21, recirculated water is demineralized water, and in contactless cooler 25, low-temperature receiver water is taken middle water or through preliminary filtration treatment, containing the seawater of silt or other impurity.
Described dust pelletizing system also comprises condensate-scavenging installation 22, wash tub pipe 24, flushing water shower nozzle 27. Liquid film deduster 21 is perpendicular to flue direction layout, and its water inlet end is communicated with deduster inlet channel 37, and water side is communicated with deduster outlet conduit 44; 33 is artificial gaging hole, and number is 3; 38,35 and 43 be respectively the thermometer of measuring low-temperature receiver water, flue gas and circulating water temperature; 32 is condensing water conduit; 41,40,34 be respectively electromagnetic flowmeter, valve and flue gas pressures meter.
Preferential, described contactless cooler 25 is shell-and-tube heat exchanger, and tube side is recirculated water, and shell side is low-temperature receiver water.
The water inlet end of described liquid film deduster 21 is communicated with liquid film deduster inlet channel 37, and the water side of described liquid film deduster 21 is communicated with liquid film deduster outlet conduit 44; The thermal source water inlet end of described contactless cooler 25 is communicated with liquid film deduster outlet conduit 44, and the thermal source water side of described contactless cooler 25 is communicated with liquid film deduster inlet channel 37; The low-temperature receiver water inlet end of described contactless cooler 25 is communicated with cooler inlet channel 26, and the low-temperature receiver water side of described contactless cooler 25 is communicated with cooler outlet conduit 42.
In described liquid film deduster 21, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness.
The surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
In described liquid film deduster 21, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
Described liquid film deduster 21 porch flue-gas temperatures are 1-70 DEG C, and exit flue-gas temperature is 1-70 DEG C.
Described liquid film deduster 21 porch flue gas flow scopes are 10000-6000000m3/h
Described liquid film deduster 21 porch flues are divided into 9 regions, liquid film deduster requires the wind speed of regional in flue: the wind speed range in region 1 is 1-20m/s, the wind speed range in region 2 is 1-20m/s, the wind speed range in region 3 is 1-20m/s, the wind speed range in region 4 is 1-20m/s, the wind speed range in region 5 is 1-20m/s, the wind speed range in region 6 is 1-20m/s, the wind speed range in region 7 is 1-20m/s, the wind speed range in region 8 is 1-20m/s, and the wind speed range in region 9 is 1-20m/s; The difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
The apparent size scope of described liquid film deduster 21 is rectangle: long 1-20 rice, wide 1-20 rice; Circular: radius 1-15 rice.
In described liquid film deduster 21, heat transferring medium input temp is 1-50 DEG C; Output temperature is 1-60 DEG C, and range of flow is 20000-6000000kg/h.
Embodiment 11
Shown in Figure 13, a kind of energy-conservation low dirt discharging fire coal thermal power generation system, comprise boiler 1, SCR denitrating tower 2, air preheater 3, electrostatic precipitator 4, air-introduced machine 5, booster fan 6, desulfurizing tower 7, chimney 8, updrift side at desulfurizing tower 7 is arranged residual neat recovering system, in the rear layout dust pelletizing system of desulfurizing tower 7. The structure of described residual neat recovering system is as shown in embodiment 1-9, and the structure of described dust pelletizing system is identical with embodiment 10.
Above-described embodiment is not the exhaustive of detailed description of the invention; also can there is other embodiment; above-described embodiment object is to illustrate the utility model, and unrestricted protection domain of the present utility model, all application that come by the utility model simple change all drop in protection domain of the present utility model.
This patent specification use-case removes to show the utility model, comprising optimal mode, and those of ordinary skill in the art is manufactured and use this utility model. The delegatable scope of this utility model comprises detailed description of the invention in content and the description of claims and the content of other embodiment. These other examples also should belong to the scope that the utility model patent right requires, as long as they contain the described technical characterictic of the identical written language of claim, or they include and the similar literal language described technical characterictic of claim without essence difference.
All patents, the full content of patent application and other bibliography should be incorporated to present specification by reference. But if a term in the application conflicts mutually with the term of including bibliography in, preferential with the application's term.
All scopes disclosed herein all comprise end points, and between end points, are to combine independently of one another.
It should be noted that " first ", " second " or similar vocabulary do not represent any order, and quality or importance are just used for distinguishing different technical characterictics. The implication that the qualifier " approximately " using in conjunction with quantity comprises described value and content context appointment. (for example: it includes the error while measuring specific quantity).
Claims (27)
1. an energy-conservation low dirt discharging fire coal thermal power generation system, comprises boiler, air preheater, blower fan, electrostatic precipitator and desulfurizing tower, it is characterized in that: the updrift side at desulfurizing tower is arranged residual neat recovering system; Or after desulfurizing tower, arrange dust pelletizing system; Or not only arranged residual neat recovering system but also after desulfurizing tower, arranged dust pelletizing system in the updrift side of desulfurizing tower;
Described residual neat recovering system, by the heat recovery in boiler tail high-temperature flue gas, by adding Hot gas turbine condensed water or feedwater, the heat of recovery is delivered among any one or any combination in following three: steam turbine low-pressure heater, turbine high-pressure heater and oxygen-eliminating device;
Described dust pelletizing system comprises liquid film deduster and contactless cooler, described liquid film deduster and contactless cooler composition closed cycle loop, in closed circuit recirculated water in liquid film deduster, absorb heat after in contactless cooler to the heat release of low-temperature receiver water.
2. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 1, it is characterized in that: described residual neat recovering system comprises nonmetal tubular type heat exchanger and contactless cooler described nonmetal tubular type heat exchanger and contactless cooler composition enclosed water-flow circuit.
3. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: the heat that described nonmetal tubular type heat exchanger place reclaims is by directly or indirectly utilizing mode to add Hot gas turbine condensed water or feedwater;
The waste heat of described recovery is directly used in the feedwater of heating from condensed water or the heater of condenser at noncontact cooler place; Or the waste heat of described recovery is used for heating cold wind at contactless cooler place, heat is being sent into the air preheater postposition high hot grade flue gas that swaps out, and uses the feedwater of this high hot grade flue gas from condensed water or the heater of condenser;
Described displacement has high hot grade flue gas for gas bypass is set before air preheater gas approach, and under the prerequisite that does not change air preheater import and export flue-gas temperature parameter, separating part flue gas is for heating the feedwater from condensed water or the heater of condenser; Or it is the high-temperature flue-gas that improves air preheater outlet that described displacement has high hot grade flue gas, for directly heating the feedwater from condensed water or the heater of condenser,
Described directly to utilize in mode input gas temperature scope in nonmetal tubular type heat exchanger be 100-200 DEG C, and exit gas temperature scope is 60-140 DEG C, and flue gas flow scope is 50000-6000000Nm3/ h; Recirculated water input temp scope is 30-60 DEG C, and output temperature scope is 40-100 DEG C, and range of flow is 20000-6000000kg/h; In contactless cooler, condensed water or feedwater input temp scope are 10-50 DEG C, and output temperature scope is 30-100 DEG C, and range of flow is 20000-6000000kg/h.
4. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: described nonmetal tubular type heat exchanger is arranged on flue, and tube side is the recirculated water from contactless cooler outlet, the high-temperature flue gas that shell side is boiler tail.
5. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, it is characterized in that: described contactless cooler is arranged between nonmetal tubular type heat exchanger and steam turbine heater or is arranged on the air channel between blower fan and air preheater, tube side is the recirculated water from nonmetal tubular type heat exchanger exit, shell side is the feedwater from condensed water or the heater of condenser, or is the cold wind from blower fan.
6. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: in described nonmetal tubular type heat exchanger, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness.
7. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: in described nonmetal tubular type heat exchanger, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
8. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: described nonmetal tubular type heat exchanger shell pass porch flue gas flow scope is 10000-6000000Nm3/ h, tube side circulating water flow weight range is 10000-6000000kg/h.
9. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, it is characterized in that: described nonmetal tubular type heat exchanger entrance place flue is divided into 9 regions, nonmetal tubular type heat exchanger requires the wind speed of regional in flue: the wind speed range in region 1 is 1-30m/s, the wind speed range in region 2 is 1-30m/s, the wind speed range in region 3 is 1-30m/s, the wind speed range in region 4 is 1-30m/s, the wind speed range in region 5 is 1-30m/s, the wind speed range in region 6 is 1-30m/s, the wind speed range in region 7 is 1-30m/s, the wind speed range in region 8 is 1-30m/s, the wind speed range in region 9 is 1-30m/s, the difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
10. energy-conservation low dirt discharging fire coal thermal power generation system according to claim 2, is characterized in that: the outward appearance of described nonmetal tubular type heat exchanger is rectangle, and size range is: long 1-20 rice, wide 1-20 rice; Or outward appearance is circular, size range is: radius 1-15 rice.
11. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 6, is characterized in that: the surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
12. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 3, it is characterized in that: before air preheater import, arrange gas bypass outlet, before electrostatic precipitator import, arrange that gas bypass imports mouth, arranges high-temperature heat-exchanging and mid temperature heat exchanger on gas bypass.
13. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 3, is characterized in that: on the flue between air preheater and electrostatic precipitator, mid temperature heat exchanger is set.
14. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 12, is characterized in that: described high temperature and mid temperature heat exchanger tube side are the feedwater from heater, shell side is high-temperature flue gas.
15. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 12, it is characterized in that: the high hot grade flue-gas temperature scope of described gas bypass outlet is 200-400 DEG C, described gas bypass remittance entrance flue gas temperature scope is 90-150 DEG C, and flue gas flow scope is 10000-2000000Nm3/ h; It is 130-260 DEG C that high-temperature heat-exchanging, mid temperature heat exchanger input to coolant-temperature gage scope, and exporting to coolant-temperature gage scope is 150-300 DEG C, and feedwater flow scope is 20000-6000000kg/h.
16. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 13, is characterized in that: described high-temperature heat-exchanging tube side is the feedwater from condensed water or the heater of condenser, and shell side is high-temperature flue gas.
17. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 13, it is characterized in that: described mid temperature heat exchanger input gas temperature scope is 140-200 DEG C, exit gas temperature scope is 90-140 DEG C, and flue gas flow scope is 50000-6000000Nm3/ h; Inputing to coolant-temperature gage scope is 30-120 DEG C, and exporting to coolant-temperature gage scope is 60-150 DEG C, and feedwater flow scope is 20000-6000000kg/h.
18. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 1, is characterized in that: described liquid film deduster is arranged perpendicular to flue direction; Described contactless cooler is shell-and-tube heat exchanger, and tube side is recirculated water, and shell side is low-temperature receiver water.
19. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: the water inlet end of described liquid film deduster is communicated with liquid film deduster inlet channel, the water side of described liquid film deduster is communicated with liquid film deduster outlet conduit; The thermal source water inlet end of described contactless cooler is communicated with liquid film deduster outlet conduit, and the thermal source water side of described contactless cooler is communicated with liquid film deduster inlet channel; The low-temperature receiver water inlet end of described contactless cooler is communicated with cooler inlet channel, and the low-temperature receiver water side of described contactless cooler is communicated with cooler outlet conduit.
20. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: in described liquid film deduster, recirculated water is demineralized water, in described contactless cooler, low-temperature receiver water is middle water or seawater.
21. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: in described liquid film deduster, heat exchanger tube all adopts fluoroplastics or polybutene material to make; The pipe external diameter of heat exchanger tube is 10:0.8-10:1.2 with the ratio of wall thickness.
22. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: in described liquid film deduster, the horizontally-arranged pipe row scope perpendicular to flue gas flow direction of heat exchanger tube is 100-1500 row; The tandem pipe row scope that is parallel to flue gas flow direction of heat exchanger tube is 10-120 row.
23. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: described liquid film deduster porch flue-gas temperature scope is 1-70 DEG C, and exit flue-gas temperature scope is 1-70 DEG C; Tube side low-temperature receiver discharge scope is 10000-6000000kg/h.
24. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: in described liquid film deduster, low-temperature receiver water input temp is 1-50 DEG C; Output temperature is 1-60 DEG C, and range of flow is 20000-6000000kg/h.
25. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, it is characterized in that: described liquid film deduster porch flue is divided into 9 regions, liquid film deduster requires the wind speed of regional in flue: the wind speed range in region 1 is 1-20m/s, the wind speed range in region 2 is 1-20m/s, the wind speed range in region 3 is 1-20m/s, the wind speed range in region 4 is 1-20m/s, the wind speed range in region 5 is 1-20m/s, the wind speed range in region 6 is 1-20m/s, the wind speed range in region 7 is 1-20m/s, the wind speed range in region 8 is 1-20m/s, the wind speed range in region 9 is 1-20m/s, the difference of 9 region minimax wind speed can not exceed 30% of maximum wind velocity.
26. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 18, is characterized in that: the outward appearance of described liquid film deduster is rectangle, and size range is: long 1-20 rice, wide 1-20 rice; Or outward appearance is circular, size range is: radius 1-15 rice.
27. energy-conservation low dirt discharging fire coal thermal power generation systems according to claim 21, is characterized in that: the surface contact angle of described fluoroplastics is: 95 °-115 °; The chemical general formula of described fluoroplastics is:
In described chemical general formula: m is 50-100, n is 1;
The molecular weight ranges of described fluoroplastics: 1 × 103-1×108。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486745A (en) * | 2019-08-29 | 2019-11-22 | 重庆大学 | A kind of desulfurizing tower entrance flue gas temperature, which is adjusted, recycles coupled system with efficient waste heat |
| CN110724965A (en) * | 2019-10-22 | 2020-01-24 | 国电新能源技术研究院有限公司 | Novel electrolysis hydrogen supply system of thermal power plant |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486745A (en) * | 2019-08-29 | 2019-11-22 | 重庆大学 | A kind of desulfurizing tower entrance flue gas temperature, which is adjusted, recycles coupled system with efficient waste heat |
| CN110724965A (en) * | 2019-10-22 | 2020-01-24 | 国电新能源技术研究院有限公司 | Novel electrolysis hydrogen supply system of thermal power plant |
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