CN203744201U - Self-deoxygenization waste heat boiler suitable for sulfur-containing fuel heating furnace - Google Patents
Self-deoxygenization waste heat boiler suitable for sulfur-containing fuel heating furnace Download PDFInfo
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- CN203744201U CN203744201U CN201320822389.9U CN201320822389U CN203744201U CN 203744201 U CN203744201 U CN 203744201U CN 201320822389 U CN201320822389 U CN 201320822389U CN 203744201 U CN203744201 U CN 203744201U
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- boiler
- waste heat
- deoxygenation
- heating furnace
- flash vessel
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Abstract
The utility model provides a self-deoxygenization waste heat boiler suitable for a sulfur-containing fuel heating furnace. The self-deoxygenization waste heat boiler comprises a waste heat recovery device, a flash evaporator internally provided with a steam-water separator, a deoxygenization water tank communicated with the flash evaporator, a steam pocket, and an evaporator arranged in a flue, wherein a heat absorption section and a heat release section of the waste heat recovery device are connected through ascending pipes and descending pipes; the heat absorption section is arranged in the flue; the steam pocket is connected with the evaporator through a circulating pipe; a boiler feed pipe passes through the heat release section and is connected with the water inlet of the flash evaporator; the water outlet of the deoxygenization water tank is connected with the steam pocket. According to the utility model, the flash evaporator is adopted for deoxygenization, and heat energy utilized for deoxygenization is exhaust gas waste heat of the boiler, so that the exhaust gas temperature of the waste heat boiler can be effectively reduced, and the waste heat of the boiler is fully utilized; as the flash evaporator is additionally added, steam extraction is not required for deoxygenization, steam consumption of the boiler is reduced, and the effectiveness of the boiler is improved.
Description
Technical field
The utility model relates to a kind of waste heat boiler, particularly relate to a kind of be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler.
Background technology
Converter Residual Heat Boiler, using residual heat from kiln furnace boiler are the common equipments that converter, using residual heat from kiln furnace reclaim.In order to prevent oxygen corrosion equipment and pipeline, converter, using residual heat from kiln furnace boiler feedwater must deoxygenations, and converter, kiln self do not have oxygen-eliminating device, and therefore converter, using residual heat from kiln furnace boiler be installing deaerating plant separately.
The deoxidation method adopting in conventional art has: chemical deoxidization, parsing deoxygenation, deaeration in condenser and thermal de-aeration.After the expensive and deoxygenation of chemical deoxidization, in water, salt content increases, and makes water quality deterioration.In the time utilizing carbon dioxide to resolve deoxygenation, can make the carbon dioxide in water increase, easily cause equipment pipeline blockage, and adjust management inconvenience.Deaeration in condenser needs complicated equipment, and equipment investment is large.Thermal de-aeration need to be taking vapours as the energy, consumes a lot of personal steam.
And existing Converter Residual Heat Boiler and using residual heat from kiln furnace exhaust gas temperature very high, could not make full use of the potential of fume afterheat.In the flue gas of sulfurous fuels heating furnace discharge, contain sour gas, when cigarette temperature is high, they can flow through the each heating surface of boiler until be removed in desulfurizing tower with the form of gaseous state; When cigarette temperature is during lower than a certain temperature, their can with flue gas in steam be combined into sulfuric acid and corrode heat transmission equipment.Large one more than the order of magnitude of heat transfer coefficient between ratio of heat transfer coefficient flue gas and heat exchanger wall between water and heat exchanger wall.Therefore, heat exchanger wall surface temperature more approaches water temperature.The conventional method of avoiding heat exchanger generation cold end corrosion is the flue-gas temperature by improving heat exchanger place.If the water temperature of heat exchange is lower, only have the very high wall surface temperature that just likely ensures heat exchanger of exhaust gas temperature that cold end corrosion does not occur higher than acid dew-point temperature, high fume temperature causes waste heat boiler efficiency significantly to reduce.Even if exhaust gas temperature is very high, in the time that the concentration of the sulfur dioxide in flue gas is higher, the cold end corrosion problem of heat exchanger is also very serious.Therefore, waste heat boiler high fume temperature is that anticorrosion is needed, that is to say and wants to make full use of fume afterheat, need to solve the problem of corrosion protection of equipment.
Chinese patent ZL201110415035.8, name is called from oxygen removing type afterheat generating system and electricity-generating method thereof, comprise condensing turbine, generator, condensate pump, oxygen-eliminating device, deaerating heater, feed pump, economizer, evaporimeter, drum, low temperature superheater, high temperature superheater, attemperator and collection vapour header, described drum or low temperature superheater or high temperature superheater or collection vapour header are connected with oxygen-eliminating device by controlled thermal source supply pipeline with the form of independent form or any combination, in the time that deaerating heater absorbs waste heat quantity not sufficient, utilize drum or low temperature superheater or the high temperature superheater carrying in system or collect vapour header oxygen-eliminating device is realized to heat supply.Waste heat in this patent utilization deaerating heater absorption boiler flue gas heats the water in oxygen-eliminating device, can reduce to a certain extent waste heat boiler exhaust gas temperature, improves waste heat recovery efficiency; But because the water of deaerating heater heating is from oxygen-eliminating device water outlet, water temperature is higher, restricted deaerating heater and utilized the waste heat in flue, the cigarette temperature of therefore discharging fume can not reduce effectively, does not play the object of the waste heat recovery efficiency of effective raising waste heat boiler.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model be to provide a kind of be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, be used for solving prior art waste heat boiler high fume temperature, and the heating source of oxygen-eliminating device is the problem that steam pumping affects boiler effect.
For achieving the above object and other relevant objects, the utility model provide a kind of be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it comprises endotherm section, heat release section, tedge, down-comer, inside establish the flash vessel of steam-water separator, the deoxygenation water tank communicating with flash vessel, drum, and be located at the evaporimeter in flue, described endotherm section is connected with down-comer by tedge with heat release section, endotherm section is located in described flue, described drum is connected by fall way with described evaporimeter, boiler feed pipe is connected with the water inlet of described flash vessel after described heat release section again, the delivery port of described deoxygenation water tank is connected with described drum.
Preferably, described boiler feed pipe is divided into two-way: main road and the branch road of drawing from described main road, and described main road is directly connected with the water inlet of described flash vessel, and described branch road is connected with the water inlet of described flash vessel after described heat release section again.
Preferably, also comprise control system, and be located at the first temperature sensor on described endotherm section, be located at the second temperature sensor of described flash vessel water inlet, and be located at respectively the first control valve, the second control valve on described main road and branch road, described the first temperature sensor, the second temperature sensor, the first control valve, the second control valve are all connected with described control system.
Preferably, the water temperature of described flash vessel water inlet is higher than 104 DEG C.
Preferably, also comprise the condensing steam turbine being connected with generator, the steam (vapor) outlet of described drum is connected with described condensing steam turbine.
Preferably, described condensing steam turbine is connected with condenser, and the outlet pipe of described condenser is connected with described branch road, and the outlet pipe of described condenser is provided with water pump.
Preferably, the top of described flash vessel is provided with steam drain, and described water inlet is located at the middle part of described flash vessel, and the bottom of described flash vessel is connected with described oxygen-eliminating device.
Preferably, the top of described flash vessel is also provided with safety relief valve.
Preferably, the two ends of described flue are respectively heating furnace and chimney.
Preferably, the exhaust outlet of one end connecting engine of described flue, the other end is directly as exhanst gas outlet.
As mentioned above, of the present utility model be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, there is following beneficial effect: the utility model adopts boiler feedwater first through waste-heat recovery device endotherm section heat absorption to reach uniform temperature and enters flash vessel and carry out flash distillation deoxygenation, without utilizing other thermals source (as boiler draws gas), boiler feedwater enters deaerated water case after flash vessel deoxygenation, then enters drum and then go condensing steam turbine acting.In the utility model, adopt flash vessel to carry out deoxygenation, the heat energy that its deoxygenation utilizes is the fume afterheat of boiler self, can effectively reduce waste heat boiler exhaust gas temperature, the waste heat of boiler is fully used, and utilize flash vessel flash distillation deoxygenation not need to draw gas, save the quantity of steam of boiler self, improved boiler self effect; Make the Temperature of Working in economizer raise simultaneously, make the metallic walls surface temperature of boiler economizer higher than flue gas dew point temperature, acid can not occur and reveal corrosion.
Brief description of the drawings
Fig. 1 be shown as of the present utility model be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler one schematic diagram.
Fig. 2 be shown as of the present utility model be applicable to sulfurous fuels heating furnace from another schematic diagram of deoxygenation waste heat boiler.
Fig. 3 is shown as the structural representation of waste-heat recovery device of the present utility model.
Fig. 4 is shown as the schematic diagram of the utility model while being applied to engine exhaust flue.
Fig. 5 is shown as the utility model another schematic diagram while being applied to engine exhaust flue.
Element numbers explanation;
1 drum;
2 flash vessels;
3 waste-heat recovery devices;
31 endotherm sections;
32 heat release section;
33 tedges;
34 down-comers;
4 economizers;
5 evaporimeters;
6 superheaters;
7 condensing steam turbines;
8 deoxygenation water tanks;
9 condensers;
10 flues;
11 second temperature sensors;
12 first control valves;
13 boiler feed pipes;
14 water pumps;
15 generators;
16 control systems;
17 second control valves;
18 first temperature sensors;
19 heating furnaces;
20 chimneys;
21 engines.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this description.
Refer to Fig. 1 to Fig. 5.Notice, appended graphic the illustrated structure of this description, ratio, size etc., all contents in order to coordinate description to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, in this description, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the utility model without essence.
As shown in Figure 1, the utility model provide a kind of be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, comprise a waste-heat recovery device, inside establish the flash vessel 2 of steam-water separator b, the deoxygenation water tank 8 communicating with flash vessel 2, drum 1, and be located at the evaporimeter 5 in flue 10, waste-heat recovery device comprises again endotherm section 31, heat release section 32, tedge 33 and down-comer 34, as shown in Figure 3, heat release section 32 is positioned at the top of endotherm section 31, endotherm section 31 is connected with down-comer 34 by tedge 33 with heat release section 32, and in heat release section 32, the mouth of pipe of tedge 33 is higher than the mouth of pipe of down-comer 34, make the heat transfer medium of rising and the heat transfer medium of decline non-interference.Endotherm section 31 is located in flue 10, and drum 1 is connected by circulating line with evaporimeter 5, and boiler feed pipe 13 is connected with the water inlet c of flash vessel 2 after heat release section 32 again, and the delivery port of deoxygenation water tank 8 is connected with drum 1.The utility model by boiler feedwater first through heat release section heat absorption reach uniform temperature again with supervisor in boiler feedwater enter the interior flash distillation deoxygenation of flash vessel 2 after converging, be that high-temperature water is without utilizing other thermals source (as boiler draws gas) deoxygenation by the water that makes to enter flash vessel 2 adding of waste-heat recovery device, boiler feedwater enters deaerated water case 8 after flash vessel 2 deoxygenations, then enters drum 1 and form steam.As can be seen here, the heat energy that in the utility model, deoxygenation utilizes is the fume afterheat in boiler flue, can effectively reduce waste heat boiler exhaust gas temperature, fume afterheat is fully used, and utilize flash vessel 2 flash distillation deoxygenations not need to draw gas, save the quantity of steam of boiler self, improved boiler self effect; Make the Temperature of Working in economizer raise simultaneously, make the metallic walls surface temperature of boiler economizer higher than flue gas dew point temperature, acid can not occur and reveal corrosion.
The concrete structure of above-mentioned flash vessel is: the top of flash vessel 2 is provided with steam drain d, and water inlet c is located at the middle part of flash vessel 2, and the bottom of flash vessel 2 is provided with skirt, and the base of this skirt is connected with the upper side of deoxygenation water tank by an adpting flange.For safe handling, the top of above-mentioned flash vessel 2 is also provided with safety relief valve a.Because the deaerating plant of employing with flash vessel is used as thermal source without using boiler to draw gas, save like this thermal effect of boiler self, improve boiler utilization rate.Meanwhile, the utility model is by adding waste-heat recovery device on boiler feedwater pipeline, and the water that makes to enter flash vessel is high-temperature water, guarantees boiler feedwater deoxygenation in flash vessel.
The boiler feed temperature of waste heat boiler is generally 20 DEG C, if flue gas directly with hot equipment heat exchange, is near or below flue gas acid dew point temperature by hot equipment wall surface temperature, may causes and corrode with the acid dew of hot equipment; And the exhaust gas temperature of exhaust-heat boiler flue gas is very high, directly discharge causes very large waste, and the utility model carrys out heating boiler feedwater by waste-heat recovery device is installed as reclaim using waste heat from tail gas with hot equipment.Waste-heat recovery device comprises the endotherm section 31 and the heat release section 32 that are connected with down-comer 34 by tedge 33, endotherm section 31 is located in flue 10, heat release section 32 is placed on the branch road of boiler feed pipe, flue gas when the endotherm section 31 by thermal release to the heat transfer medium in endotherm section 31, heat transfer medium absorbs the lift producing because of density contrast after heat and enters heat release section 32 by tedge 33, in heat release section 32, after release heat, get back to endotherm section 31 by down-comer 34, complete thus a circulation, in whole cyclic process without external impetus.Endotherm section is placed in flue and absorbs heat and pass to heat transfer medium, heat transfer medium passes to the boiler feedwater of 20 DEG C again in heat release section, by boiler feedwater heat temperature raising, make the water temperature of flash vessel water inlet reach deoxygenation temperature more than 104 DEG C, the heat transfer medium of waste-heat recovery device is often high temperature forced circulation water or Natural Circulation steam, therefore its heat transfer coefficient is surveyed far above flue gas, wall surface temperature is determined by heat transfer medium side temperature, therefore can control waste-heat recovery device by the temperature of Heat Transfer Control medium and avoid the corrosion of acid dew.
Above-mentioned boiler feed pipe 13 is divided into two-way: main road and the branch road of drawing from main road, and main road is directly connected with the water inlet c of flash vessel 2, and branch road is connected with the water inlet c of flash vessel 2 after heat release section 32 again.Can so that regulate the caloric receptivity of above-mentioned endotherm section, be easy to realize automatic control like this.
As shown in Figure 2, in the flue of above-mentioned endotherm section front, also can establish an economizer 4, the delivery port of above-mentioned deoxygenation water tank 8 is connected with the water inlet of economizer 4, the delivery port of economizer 4 is connected with drum 1, can make like this boiler feedwater enter deaerated water case 8 after flash vessel 2 deoxygenations, then form steam by entering drum 1 after economizer 4, make the further preheating of boiler feedwater, improve the water temperature that enters drum, reach better residual heat from boiler fume utilization rate.
Normally work for making better the each equipment in the utility model flue, avoid acid and reveal corrosion, the utility model also comprises control system 16, control system 16 be located at the first temperature sensor 18 on endotherm section, be located at second temperature sensor 11 at flash vessel water inlet c place and be located at respectively above-mentioned main road and be connected with the first control valve 12, the second control valve 17 on branch road.The first control valve 12 is three-way control valve, and it is above-mentioned supervisor and arm that boiler feed pipe is divided into two-way by it, and the flow of arm can also regulate by the second control valve 17, the fume afterheat amount being absorbed to control.Therefore, this control system can effectively be controlled the temperature of oxygen-eliminating device 8 more than deoxygenation temperature (approximately 104 DEG C), improve oxygen removal efficiency, control the wall surface temperature of above-mentioned endotherm section 31 higher than acid dew-point temperature simultaneously, fundamentally avoid acid to reveal corrosion and clogging phenomenon.
In the utility model, boiler feedwater flows to and is: it is main road and branch road that boiler feedwater is divided into two-way by the first control valve 12 on boiler feed pipe 13, boiler feedwater in branch road after heat release section 32 heat absorption with main road in boiler feedwater converge from the water inlet c of flash vessel 2 and enter flash vessel 2, the boiler feedwater that now enters flash vessel is high-temperature water, guarantee that it can deoxygenation enter deoxygenation water tank 8 in flash vessel, after deoxygenation, can enter economizer 4 further absorbs heat, enter again drum 1, between drum 1 and evaporimeter 5, circulate and absorb heat and become steam, the steam forming can go generating, steam (vapor) outlet by drum 1 is connected with condensing steam turbine 7, condensing steam turbine 7 is connected with generator 15.As needs superheated steam, as shown in Figure 2, the steam (vapor) outlet of drum 1 can be connected with the superheater 6 being located in flue 10, superheater 6 is connected with above-mentioned condensing steam turbine 7 again, and then superheated steam drives generator 15 to generate electricity in the interior acting of condensing steam turbine 7.Condensing steam turbine 7 is connected with condenser 9, the outlet pipe of condenser 9 is connected with above-mentioned branch road, becomes water to be recycled in boiler feedwater the steam condensation after acting, after going here and there mutually, heats through heat release section 32 with above-mentioned branch road, for ease of the circulation of water, the outlet pipe of this condenser 9 is provided with water pump 14.
In embodiment shown in Fig. 1 and Fig. 2, flue 10 is arranged between heating furnace 19 and chimney 20.
But said sulfurous fuels heating furnace can be also the boiler of engine or other high fume temperatures in the utility model.As shown in Figure 4, Figure 5, in the time that said sulfurous fuels heating furnace is mean engine, the exhaust outlet of the front end connecting engine 21 of flue 10, and the end of flue 10 is not established chimney, directly as exhanst gas outlet.
In sum, of the present utility model be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, the heat energy that in the utility model, deoxygenation utilizes is the fume afterheat in boiler flue, can effectively reduce waste heat boiler exhaust gas temperature, fume afterheat is fully used, and utilize flash vessel flash distillation deoxygenation not need to draw gas, and save the quantity of steam of boiler self, improve boiler self effect; Make the Temperature of Working in economizer raise simultaneously, make the metallic walls surface temperature of boiler economizer higher than flue gas dew point temperature, acid can not occur and reveal corrosion.So the utility model has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (10)
- One kind be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that, comprise a waste-heat recovery device, inside establish the flash vessel (2) of steam-water separator, the deoxygenation water tank (8) communicating with flash vessel (2), drum (1), and be located at the evaporimeter (5) in flue (10), the endotherm section (31) of described waste-heat recovery device is connected with down-comer (34) by tedge (33) with heat release section (32), endotherm section is located in described flue (10), described drum (1) is connected by circulating line with described evaporimeter (5), boiler feed pipe is connected with the water inlet of described flash vessel (2) after described heat release section again, the delivery port of described deoxygenation water tank (8) is connected with described drum (1).
- According to claim 1 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: described boiler feed pipe is divided into two-way: main road and the branch road of drawing from described main road, described main road is directly connected with the water inlet of described flash vessel (2), and described branch road is connected with the water inlet of described flash vessel (2) after described heat release section again.
- According to claim 2 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: also comprise control system (16), and be located at the first temperature sensor (18) on described endotherm section, be located at second temperature sensor (11) of described flash vessel water inlet and be located at respectively the first control valve 12 on described main road and branch road, the second control valve 17, described the first temperature sensor (18), the second temperature sensor (11), the first control valve 12, the second control valve 17 is all connected with described control system (16).
- According to claim 3 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: the water temperature of described flash vessel water inlet is higher than 104 DEG C.
- According to claim 1 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: also comprise the condensing steam turbine (7) being connected with generator (15), the steam (vapor) outlet of described drum (1) is connected with described condensing steam turbine (7).
- According to claim 5 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: described condensing steam turbine (7) is connected with condenser (9), the outlet pipe of described condenser (9) is connected with described branch road, and the outlet pipe of described condenser (9) is provided with water pump (14).
- According to claim 1 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: the top of described flash vessel (2) is provided with steam drain (d), described water inlet (c) is located at the middle part of described flash vessel (2), and the bottom of described flash vessel (2) is connected with described deoxygenation water tank (8).
- According to claim 7 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: the top of described flash vessel (2) is also provided with safety relief valve (a).
- According to claim 1 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: the two ends of described flue (10) are respectively heating furnace and chimney.
- According to claim 1 be applicable to sulfurous fuels heating furnace from deoxygenation waste heat boiler, it is characterized in that: the exhaust outlet of one end connecting engine of described flue (10), the other end is directly as exhanst gas outlet.
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CN201320822389.9U CN203744201U (en) | 2013-12-12 | 2013-12-12 | Self-deoxygenization waste heat boiler suitable for sulfur-containing fuel heating furnace |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104265427A (en) * | 2014-08-07 | 2015-01-07 | 哈尔滨工程大学 | Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship |
CN104713058A (en) * | 2013-12-12 | 2015-06-17 | 霍特安热能技术(江苏)有限公司 | Self-deoxidization waste heat boiler suitable for sulfur-containing fuel |
CN107145175A (en) * | 2017-05-26 | 2017-09-08 | 中国核动力研究设计院 | A kind of steam generator feed temperature controls simulation system |
-
2013
- 2013-12-12 CN CN201320822389.9U patent/CN203744201U/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104713058A (en) * | 2013-12-12 | 2015-06-17 | 霍特安热能技术(江苏)有限公司 | Self-deoxidization waste heat boiler suitable for sulfur-containing fuel |
CN104713058B (en) * | 2013-12-12 | 2017-05-24 | 霍特安热能技术(江苏)有限公司 | Self-deoxidization waste heat boiler suitable for sulfur-containing fuel |
CN104265427A (en) * | 2014-08-07 | 2015-01-07 | 哈尔滨工程大学 | Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship |
CN107145175A (en) * | 2017-05-26 | 2017-09-08 | 中国核动力研究设计院 | A kind of steam generator feed temperature controls simulation system |
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Granted publication date: 20140730 Termination date: 20171212 |