CN203629337U - Low-temperature organic Rankine cycling cement plant waste heat power generating device - Google Patents
Low-temperature organic Rankine cycling cement plant waste heat power generating device Download PDFInfo
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- CN203629337U CN203629337U CN201320567496.1U CN201320567496U CN203629337U CN 203629337 U CN203629337 U CN 203629337U CN 201320567496 U CN201320567496 U CN 201320567496U CN 203629337 U CN203629337 U CN 203629337U
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Abstract
The utility model belongs to the technical field of waste heat utilization and provides a low-temperature organic Rankine cycling (LTORC) cement plant waste heat power generating device which comprises a kiln tail boiler, a kiln head boiler, a pressure adjusting valve, a working medium pump, a working medium storage tank, a condenser, a heat-work power conversion machine, a power generator and the like. Operating temperature of the device is blow 100 DEG C, so that utilization temperature of the waste heat power generating device can be substantially lowered, low-temperature waste heat at 40-100 DEG C can be effectively recycled, the waste heat power generating device can be applied to recycling of middle-high-temperature waste heat, above 100 DEG C, of a cement plant for power generation, recycling rate of waste heat is increased substantially, recycling range of the waste heat is expanded, and power generating capability is improved substantially. The low-temperature organic Rankine cycling cement plant waste heat power generating device can fully draw process waste heat of a cement production line, and cement ton clinker power generating capacity exceeds 45kwh. By utilizing low-temperature waste heat generated in the process of cement production for power generation, energy consumption can be effectively lowered, production cost is saved, dust pollution and haze emission can be greatly reduced, and ecological environment is improved.
Description
Technical field
The utility model belongs to industrial afterheat power generation field, particularly a kind of low form organic Rankine circulation cement plant device for generating power by waste heat.
Background technology
Cement industry is the big power consumer of China's emphasis, and energy resource consumption total amount accounts for 5% of national total energy consumption.20.6 hundred million tons of national cement outputs in 2012, consume primary energy (standard coal) 2.16 hundred million tons, simultaneously power consumption 1,686 hundred million degree.The energy that the consumption of burning clinker of cement process need is a large amount of, one ton of clinker of every production approximately consumes 120 kg mark coal, and power consumption 80 is spent.In whole manufacture of cement cost, the electricity charge approach 30% of totle drilling cost, and thermal energy consumption also approaches 30% of totle drilling cost, and to add up to energy cost be totle drilling cost 60%.Except higher energy resource consumption, in the production process of cement, also can cause more serious environmental pollution.Cement industry dust discharge amount accounts for 30% of China's industrial trade dust emission total amount, CO
2discharge capacity account for China CO
220% of total emission volumn, SO
2discharge accounts for 2.6% of the whole nation.In cement production process, 350 ℃ of following waste gas of being drained by kiln hood chamotte cooler and kiln tail preheater, its heat accounts for the more than 30% of Cement clinker buring device total heat consumption, and make full use of the transformation of generating electricity of this part low temperature waste gas waste heat, become one of energy-saving and cost-reducing effective way of current domestic cement industry, both can effectively reduce energy consumption, saved production cost, can also reduce in a large number dust pollution and toxic emission, improve the ecological environment.In existing cement kiln factory, utilize low-temperature cogeneration device, its generation comprehensive cost is about 25% left and right of electrical network electricity price, and whole power generation process neither increases any new fuel consumption simultaneously, also can effectively reduce toxic emission, and can greatly reduce production costs.But still there is following problem in existing cement kiln factory middle and low temperature waste heat power generation device:
(1) generating efficiency is lower.The new type nonaqueous cement production line pure low-temperature cogeneration device of domestic common employing at present, all to utilize the hot blast of extracting out from existing cement producing line kiln hood grate cooler cooling air, heat with the flue gas of being discharged by one-level preheater, become the interior energy of steam by waste heat boiler, with steam Rankine cycle device (the Rankine cycle of the fifties, be called for short RC) thermal power generating technology, drive steam turbine generator generating; But in existing new type nonaqueous cement production line, kiln hood waste heat boiler and kiln tail waste heat boiler are not high to the high-temperature flue-gas of discharging, can only produce the steam of low-pressure, low temperature parameter, steam turbine generator efficiency low (18% left and right), unit heat energy power-generating amount is low; Utilize the ton grog generating capacity of this new dry process rotary kiln pure low-temperature cogeneration generally to only have 26-28kwh.
(2) waste heat recovery rate is lower.Domestic existing middle-low temperature heat steam Rankine cycle technology, 200 ℃ do not have technology and ability to reclaim below, waste, although existing traditional steam turbine technology can reclaim 300 ℃ of above middle high-temperature residual heats, but its rate of recovery is very low, to reclaim the waste heat of 350 ℃ as example, domestic existing low-temperature electricity-generating technology, all the other heat recovery rates only have 15%, and most waste heat has all wasted.Domestic existing middle-low temperature heat steam Rankine cycle technology, the EGT after generating also has 100 ℃ of-180 ℃ of left and right, and this heat does not make full use of and directly by chimney discharge in vain.
Utility model content
Utility model object: the utility model provides a kind of low form organic Rankine circulation cement plant device for generating power by waste heat that can effectively utilize a large amount of cryogenic waste heat resource in cement plant to generate electricity.
Technical scheme: a kind of low form organic Rankine circulation cement plant device for generating power by waste heat that the utility model provides, comprises the surplus heat collection device, pressure regulator valve (3), hot merit power conversion machinery (4), condenser (5), working medium holding vessel (6) and the working medium pump (7) that are in turn connected into ring; Described surplus heat collection device comprises kiln tail surplus heat collection device (1) in parallel and kiln hood surplus heat collection device (2); Described kiln tail surplus heat collection device (1) comprises the first gas bag (11), the first preheater (12), the first evaporimeter (13), the first superheater (14), the first preheater (12) import is connected with working medium pump (7), export with the first gas bag (11) bottom and be connected, the first evaporimeter (13) import is all connected with the first gas bag (11) with outlet, and the first superheater (14) import is connected with the first gas bag (11) top, outlet is connected with pressure regulator valve (3); Described kiln hood surplus heat collection device (2) comprises the second gas bag (21), the second preheater (22), the second evaporimeter (23), the second superheater (24), the second preheater (22) import is connected with working medium pump (7), export with the second gas bag (21) bottom and be connected, the second evaporimeter (23) import is all connected with the second gas bag (21) with outlet, and the second superheater (24) import is connected with the second gas bag (21) top, outlet is connected with pressure regulator valve (3).
As improvement, the evaporating temperature of described the first evaporimeter (13) is 30 ℃-100 ℃, and the evaporating temperature of described the second evaporimeter (23) is 30 ℃-100 ℃.
Improve as another kind, also comprise generator (8), described generator (8) is connected with hot merit power conversion machinery (4).
Improve as another kind, described condenser (5) is water-cooled condenser or air-cooled condenser.
Improve as another kind, described hot merit power conversion machinery (7) is steam turbine or decompressor.
As further improvement, described decompressor is scroll expansion machine, screw decompressor, centrifugal decompressor or piston expansion engine.
As preferably, described low form organic Rankine circulation cement plant device for generating power by waste heat adopt critical-temperature below 100 ℃, the single or mixed working fluid of boiling point below-40 ℃ be as cycle fluid.
As further preferred, described working medium is selected from one or both in propane and carbon dioxide.
Beneficial effect: the low form organic Rankine circulation cement plant device for generating power by waste heat that the utility model provides can significantly reduce the temperature of utilizing of Technology in Surplus Heat Power Generation of Cement Factory device, not only can be applied to and reclaim 100 ℃ of above middle high-temperature residual heats, and can effectively reclaim the low temperature exhaust heat of 40 ℃-100 ℃, thereby in significantly improving, the waste heat recovery rate of high-temperature residual heat generating, has improved generating capacity greatly.
100 ℃ of critical-temperatures are following by adopting for this device, the medium of boiling point below-40 ℃ be as working medium, can produce the organic steam of high pressure parameter, the ton grog generating capacity of this device is generally at 40-45kwh, far above the ability (26-28kwh) of domestic existing middle high-temperature residual heat generating.
This device can utilize the various low temperature in cement plant, middle temperature, high-temperature residual heat generating, has the advantages such as waste heat recovery rate is high, generated energy large, the scope of recovery waste heat is wide.Can utilize oneself waste heat to set up private station in each cement plant enterprise of China, the transformation cement plant industrial structure, effectively reduces power consumption and the production cost in cement plant, thereby can improve domestic energy use efficiency, improve haze air, effectively realize energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model low form organic Rankine circulation cement plant device for generating power by waste heat.
The specific embodiment
Below in conjunction with accompanying drawing and example, the utility model is described in further detail, but protection domain of the present utility model is not limited to described content.
Low form organic Rankine circulation cement plant device for generating power by waste heat, comprises generator 8 and is in turn connected into surplus heat collection device, pressure regulator valve 3, hot merit power conversion machinery 4, condenser 5, working medium holding vessel 6, the working medium pump 7 of ring; Surplus heat collection device comprises kiln tail surplus heat collection device 1 and kiln hood surplus heat collection device 2 in parallel; Kiln tail surplus heat collection device 1 comprises the first gas bag 11, the first preheater 12, the first evaporimeter 13, the first superheater 14, the first preheater 12 imports are connected with working medium pump 7, export with the first gas bag 11 bottoms and be connected, the first evaporimeter 13 imports are all connected with the first gas bag 11 with outlet, and the first superheater 14 imports are connected with the first gas bag 11 tops, outlet is connected with pressure regulator valve 3; Kiln hood surplus heat collection device 2 comprises the second gas bag 21, the second preheater 22, the second evaporimeter 23, the second superheater 24, the second preheater 22 imports are connected with working medium pump 7, export with the second gas bag 21 bottoms and be connected, the second evaporimeter 23 imports are all connected with the second gas bag 21 with outlet, and the second superheater 24 imports are connected with the second gas bag 21 tops, outlet is connected with pressure regulator valve 3; Generator 8 is connected with hot merit power conversion machinery 4.
In the utility model, the evaporating temperature of the first evaporimeter 13 is controlled at the low-temperature region between 30 ℃-100 ℃ by the Choice and design of working medium, and it is the low-temperature region between 30 ℃-100 ℃ that the second evaporimeter 23 is controlled at evaporating temperature by the Choice and design of working medium.
Hot merit switch machine 4 be steam turbine; Alternatively, also can select the hot merit switch machine of any appropriate; Preferably, can select steam turbine or decompressor, wherein, decompressor includes but not limited to scroll expansion machine, screw decompressor, centrifugal decompressor and piston expansion engine.
The operation principle of this device is:
Kiln tail surplus heat collection device 1 is arranged in kiln tail heat recovery boiler 9, and kiln hood surplus heat collection device 2 is arranged in kiln hood heat recovery boiler 10; Kiln tail gas (temperature is generally at 310 ℃-340 ℃) is passed in kiln tail heat recovery boiler 9, kiln tail surplus heat collection device 1 is collected kiln tail waste heat, kiln hood EGT is generally passed in kiln hood heat recovery boiler 10 at 350 ℃-390 ℃, and kiln hood surplus heat collection device 2 is collected kiln hood waste heat; Working medium is transported to respectively kiln tail surplus heat collection device 1, kiln hood surplus heat collection device 2 and is heated to subcritical or supercriticality, the steam that mineralization pressure is higher in interior from working medium holding vessel 6 by working medium pump 7; Working substance steam, by pressure regulator valve 3, enters the 4 expansion actings of hot merit power conversion machine, drives generator 8 to generate electricity, and the working medium of exhaust steam is got back to working medium holding vessel 6 after entering condenser 5 condensations, completes once circulation.
Above-mentioned low form organic Rankine circulation (LTORC) Technology in Surplus Heat Power Generation of Cement Factory device is used for to cogeneration under different condition.
The evaporating temperature of application example one, the first evaporimeter 13 and the second evaporimeter 23 is 100 ℃, and condenser 5 condensation temperatures are 30 ℃, adopts propane as cycle fluid, and condenser 5 adopts air-cooled condenser, the results are shown in Table 1.
Table 1 low form organic Rankine circulation (LTORC) and the both at home and abroad comparison of low-temperature cogeneration
The definition of waste heat recovery rate: (waste heat supply temperature-generating operation temperature)/(waste heat supply temperature-environment temperature), namely waste heat can be used for the ratio of the part of generating.
As seen from the above table:
(1), as long as heat source temperature reaches more than 100 ℃, can utilize the generating of the utility model equipment.
(2) reclaim 150 ℃ of waste heats, the utility model can reach 42% waste heat recovery rate, but low-temperature cogeneration both domestic and external all can not utilize such thermal source.
(3) reclaim the waste heat of 350 ℃, existing external low-temperature cogeneration technology, all the other heat recovery rates only have 15%, 85% waste heat all to waste, and adopt the utility model equipment, and waste heat recovery rate can bring up to 78%, has increased more than 5 times.
The evaporating temperature of application example two, the first evaporimeters 13 and the second evaporimeter 23 is 60 ℃, and condenser 5 condensation temperatures are 30 ℃, adopts the mixture of propane and carbon dioxide as cycle fluid, and condenser 5 adopts water-cooled condenser, the results are shown in Table 2.
The circulation of table 2 low form organic Rankine and the both at home and abroad comparison of low-temperature cogeneration
As seen from the above table:
(1), as long as heat source temperature reaches more than 60 ℃, can utilize the generating of the utility model equipment.
(2) reclaim 100 ℃ of waste heats, the utility model can reach 57% waste heat recovery rate, but low-temperature cogeneration both domestic and external all can not utilize such thermal source.
(3) reclaim 150 ℃ of waste heats, the utility model can reach 75% waste heat recovery rate, but low-temperature cogeneration both domestic and external is general equal can not utilize such thermal source.
(4) reclaim 350 ℃ of above waste heats, existing external low-temperature cogeneration technology, all the other heat recovery rates only have 15%, and the waste heat of residue 85% has all wasted, and adopts the utility model equipment, and waste heat recovery rate can bring up to 90%, has increased more than 6 times.
The evaporating temperature of application example three, the first evaporimeters 13 and the second evaporimeter 23 is 30 ℃, and condenser 5 condensation temperatures are 0 ℃, adopts carbon dioxide as cycle fluid, and condenser 5 adopts air-cooled condenser, is suitable for northern cold area.The results are shown in Table 3.
The circulation of table 3 low form organic Rankine and the both at home and abroad comparison of low-temperature cogeneration
As seen from the above table:
(1), as long as heat source temperature reaches more than 40 ℃, can utilize the generating of the utility model equipment.
(2) reclaim 60 ℃ of waste heats, the utility model can reach 50% waste heat recovery rate, but low-temperature cogeneration both domestic and external all can not utilize such thermal source.
(3) reclaim 100 ℃ of waste heats, the utility model can reach 70% waste heat recovery rate, but low-temperature cogeneration both domestic and external is general equal can not utilize such thermal source.
(4) reclaim the waste heat of 150 ℃, the utility model can reach 80% waste heat recovery rate, but low-temperature cogeneration both domestic and external is general equal can not effectively utilize such thermal source.
Disclosed is above only specific embodiment of the utility model, and temperature range in addition, can design working medium according to the height of the temperature of waste heat, adjusts the ratio of each component, to reach the highest hot merit conversion efficiency and heat recovery rate.In example, adopt the comparison of working medium and advise that applicable waste heat supply temperature is as table 4.
Table 4 low form organic Rankine follows the characteristic of working medium
Disclosed is above only specific embodiment of the utility model; but the utility model is not limited thereto; in addition; the utility model can also other modes be realized; do not departing under the prerequisite of the design of the utility model utility model and utility model spirit, any apparent change and replacement are all within protection domain of the present utility model.
Claims (8)
1. a low form organic Rankine circulation cement plant device for generating power by waste heat, is characterized in that: comprise the surplus heat collection device, pressure regulator valve (3), hot merit power conversion machinery (4), condenser (5), working medium holding vessel (6) and the working medium pump (7) that are in turn connected into ring; Described surplus heat collection device comprises kiln tail surplus heat collection device (1) in parallel and kiln hood surplus heat collection device (2); Described kiln tail surplus heat collection device (1) comprises the first gas bag (11), the first preheater (12), the first evaporimeter (13), the first superheater (14), the first preheater (12) import is connected with working medium pump (7), export with the first gas bag (11) bottom and be connected, the first evaporimeter (13) import is all connected with the first gas bag (11) with outlet, and the first superheater (14) import is connected with the first gas bag (11) top, outlet is connected with pressure regulator valve (3); Described kiln hood surplus heat collection device (2) comprises the second gas bag (21), the second preheater (22), the second evaporimeter (23), the second superheater (24), the second preheater (22) import is connected with working medium pump (7), export with the second gas bag (21) bottom and be connected, the second evaporimeter (23) import is all connected with the second gas bag (21) with outlet, and the second superheater (24) import is connected with the second gas bag (21) top, outlet is connected with pressure regulator valve (3).
2. a kind of low form organic Rankine circulation according to claim 1 cement plant device for generating power by waste heat, it is characterized in that: the evaporating temperature of described the first evaporimeter (13) is 30 ℃-100 ℃, the evaporating temperature of described the second evaporimeter (23) is 30 ℃-100 ℃.
3. a kind of low form organic Rankine circulation according to claim 1 cement plant device for generating power by waste heat, is characterized in that: also comprise generator (8), described generator (8) is connected with hot merit power conversion machinery (4).
4. a kind of low form organic Rankine circulation according to claim 1 cement plant device for generating power by waste heat, is characterized in that: described hot merit power conversion machinery (4) is steam turbine or decompressor.
5. a kind of low form organic Rankine circulation according to claim 4 cement plant device for generating power by waste heat, is characterized in that: described decompressor is scroll expansion machine, screw decompressor, centrifugal decompressor or piston expansion engine.
6. a kind of low form organic Rankine circulation according to claim 1 cement plant device for generating power by waste heat, is characterized in that: described condenser (5) is water-cooled condenser or air-cooled condenser.
7. a kind of low form organic Rankine circulation according to claim 1 cement plant device for generating power by waste heat, is characterized in that: described low form organic Rankine circulation cement plant device for generating power by waste heat adopt critical-temperature below 100 ℃, the single or mixed working fluid of boiling point below-40 ℃ be as cycle fluid.
8. a kind of low form organic Rankine circulation according to claim 7 cement plant device for generating power by waste heat, is characterized in that: described working medium is selected from the one in propane and carbon dioxide.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004194A (en) * | 2015-08-17 | 2015-10-28 | 中能世华(北京)节能科技有限公司 | Automatic auxiliary power supplementing system through heat power generation during cement production |
| CN105089729A (en) * | 2015-09-06 | 2015-11-25 | 东南大学 | System and method for recycling waste heat of two-stage efficient circulation evaporation organic Rankine cycle coal-fired flue gas |
| CN106871654A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of high temperature heat in accumulation kiln hood |
| CN106871635A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of accumulation radiant heat of rotary kiln |
| CN107062892A (en) * | 2017-04-18 | 2017-08-18 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of hyperthermia radiation heat energy in a kind of accumulation kiln head cover |
| CN108979774A (en) * | 2018-09-14 | 2018-12-11 | 广东兴发铝业（河南）有限公司 | Device for recycling heat in aluminum profile process |
-
2013
- 2013-09-12 CN CN201320567496.1U patent/CN203629337U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004194A (en) * | 2015-08-17 | 2015-10-28 | 中能世华(北京)节能科技有限公司 | Automatic auxiliary power supplementing system through heat power generation during cement production |
| CN105089729A (en) * | 2015-09-06 | 2015-11-25 | 东南大学 | System and method for recycling waste heat of two-stage efficient circulation evaporation organic Rankine cycle coal-fired flue gas |
| CN106871654A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of high temperature heat in accumulation kiln hood |
| CN106871635A (en) * | 2017-04-18 | 2017-06-20 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of accumulation radiant heat of rotary kiln |
| CN107062892A (en) * | 2017-04-18 | 2017-08-18 | 长沙紫宸科技开发有限公司 | The carbon dioxide energy storage equipment of hyperthermia radiation heat energy in a kind of accumulation kiln head cover |
| CN108979774A (en) * | 2018-09-14 | 2018-12-11 | 广东兴发铝业（河南）有限公司 | Device for recycling heat in aluminum profile process |
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