CN105139155A - Distributed energy efficiency assessment index system for ethylene production process - Google Patents
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- CN105139155A CN105139155A CN201510628312.1A CN201510628312A CN105139155A CN 105139155 A CN105139155 A CN 105139155A CN 201510628312 A CN201510628312 A CN 201510628312A CN 105139155 A CN105139155 A CN 105139155A
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 72
- 239000005977 Ethylene Substances 0.000 title claims abstract description 70
- 238000011156 evaluation Methods 0.000 claims abstract description 47
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000005265 energy consumption Methods 0.000 claims description 41
- 238000005336 cracking Methods 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 20
- 239000002609 medium Substances 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 11
- 238000000197 pyrolysis Methods 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 8
- 238000005204 segregation Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 239000013587 production medium Substances 0.000 claims description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 12
- 238000004445 quantitative analysis Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/80—Management or planning
- Y02P90/82—Energy audits or management systems therefor
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Abstract
The invention belongs to the field of energy efficiency evaluation indexes and mainly relates to a distributed energy efficiency assessment index system for the ethylene production process. Based on the system, the comprehensive and scientific energy efficiency assessment for the ethylene production process can be realized. According to the technical scheme of the invention, the process stages of the ethylene production process are determined based on the medium flow condition of the actual ethylene production process. After that, according to production monitoring requirements and energy efficiency assessment requirements for each stage of the ethylene production process, the distributed energy efficiency assessment index system is established in consideration of the levels of indexes and the time scale at the same time. According to the technical scheme of the invention, the ethylene production process is divided into stages, so that the energy efficiency assessment is more targeted. Assessment indexes are divided into different levels in multiple dimensions, so that the unicity and the centrality of assessment indexes for the ethylene production process are effectively improved. In this way, the energy efficiency assessment is more comprehensive. The assessment indexes are distributed in the dimension of the time scale, so that the energy efficiency assessment is more scientific and more specific. The distributed energy efficiency assessment index system provides a quantitative analysis and decision basis for the energy efficient use in the ethylene industry. Therefore, the system can be widely applied to the field of energy efficiency assessment indexes for ethylene production.
Description
Technical field
The present invention relates to a kind of energy efficiency evaluation index system, particularly about a kind of distributed energy efficiency evaluation index system of ethylene production.
Background technology
Clearly propose in Ministry of Industry and Information's " industrial energy saving " 12 " planning ", within 2015, petrochemical complex " unit industrial added value " observable index declines 18% in 2010.Ethylene industry is the pillar of petroleum chemical industry, and the height of ethylene yield is the outstanding feature of a measurement national oil development of chemical industry level.
Since the sixties in 20th century, China focuses on the development of ethylene industry always, and ethylene production has considerable scale, and output occupies the second in the world, but because China is for the powerful market demand of ethene, the domestic ethene degree of self-sufficiency was only 61% by the end of 2015 years.Meanwhile, still there is a big difference for the ethylene of China and international technology level, 2006, and the ethene comprehensive energy consumption of international most advanced level reaches 500 kilograms of mark oil/tons, and China is high by about 40% by comparison.Due to domestic shortage lighter hydrocarbons resource, ethylene production, based on naphtha, makes production cost relatively high, therefore, puts forth effort industry restructuring and transforms mode of economic growth, and the energy utilization rate improving ethylene production is the Major Developmental Objectives of ethylene production.
To realize the target of ethylene industry Intensive Growth, improving efficiency is the most effective means, but prerequisite is carried out rationally the energy service condition of ethylene production, science, effectively to assess.In actual applications, ethylene production is often confined in the technological transformation of equipment component and process modification, and lacks scientific and effective energy efficiency evaluation index system, makes further development of latent energy-saving potential, reduces energy consumption and be very restricted.So far, the energy efficiency evaluation index system for ethylene production proposition is as follows:
(1) in conjunction with the feature of ethene enterprise competitiveness, establish the assessment indicator system of applicable ethene competitiveness, propose scope of the enterprise, technical capability etc. 6 aspect affect 18 evaluation indexes such as evaluation content and total assets, ethene ability, oil selfsufficiency rate of ethene enterprise competitiveness.But owing to affecting a lot of because have of enterprise competitiveness, the competition simultaneously between enterprise is a dynamic process constantly adjusted, and the weighted value of many evaluation indexes needs contrast concrete condition and passage of time to make corresponding adjustment.
(2) based on collecting and arrange domestic each ethene flow process historical operating data of nearly 10 years, analyzing data and relevant energy consumption, material consumption data, for the energy consumption of different technologies ethene flow process and raw material and product, load and productive capacity energy consumption characters, set up the multistage ethylene flow process energy consumption index system of single device, many devices and industry, comprise monitoring index, analysis indexes and energy efficiency indexes.This index system is not comprehensive to the industrial analysis of ethene flow process, and data are complicated simultaneously, poor operability.
(3) the energy efficiency indexes system of typical petrochemical iy produced (comprising the catalytic cracking ethylene production) is set up from different grain size (device level, procedure level, system-level) and different aspects (management efficiency, production efficiency, environment efficiency and economic efficiency etc.).This index system could not be analyzed concrete production run, does not analyze industrial flow transversal sectional, and index lacks the time scale of concrete production run, the concrete consideration of index property simultaneously.
In sum, in existing ethylene production energy efficiency evaluation index system and in building, (1) does not consider that competition among enterprises is a dynamic process constantly adjusted, and have ignored the weighted value of many evaluation indexes contrast concrete condition and passage of time; (2) industrial analysis for ethylene production is not comprehensive, and data are many and complicated simultaneously, poor operability.(3) although study by different level production run on the basis of (2), could not analyze concrete production run, not to industrial flow piecewise analysis, lack the consideration that index time scale, index various dimensions are divided simultaneously.
Summary of the invention
For the problems referred to above, the object of the invention is the construction method of the distributed energy efficiency evaluation index system proposing a kind of ethylene production.
For achieving the above object, the present invention takes following technical scheme:
(1) a distributed energy efficiency evaluation index system for ethylene production, achieves for the comprehensive, scientifical energy efficiency evaluation of ethylene production.This system carries out technique subsection according to the medium stream of actual ethylene production, then according to production monitoring and energy efficiency evaluation requirement, considers rank and the time scale of index simultaneously, finally determines distributed energy efficiency evaluation index system.The feature of this index system is to add ethylene production energy analysis
energy efficiency evaluation index, entropy energy efficiency evaluation index is added to the analysis of ethylene production variety of energy sources, from technique subsection, time scale, index levels, distributed energy efficiency evaluation index system is determined to concrete energy efficiency evaluation index, thus effectively improve centrality and the unicity of ethylene production energy efficiency evaluation index, realize ethylene production comprehensively, the energy efficiency evaluation of various dimensions.
(2) ethylene production is divided into the full section of ethylene production, raw material cracking section and Product recycling segregation section according to production medium stream, according to production monitoring and energy efficiency evaluation requirement, sends outside from energy resource consumption, Energy Intensity, energy conversion, the energy, entropy,
product yield, recovery various dimensions carry out classification to index; Wherein the full section of ethylene production, raw material cracking section, Product recycling segregation section represent with A, B, C respectively, and first class index and two-level index represent with a, b respectively, and each index number is shown in bracket internal label, as table 1: table 1
Table 1
Wherein, comprehensive energy consumption, unit product comprehensive energy consumption, unit industrial added value energy consumption are provided by " comprehensive energy consumption calculates general rule GB/T2589-2008 "; Cracking severity and quench oil viscosity are obtained by hard measurement; Send comprehensive energy consumption outside to calculate according to " comprehensive energy consumption calculates general rule GB/T2589-2008 " according to sending variety of energy sources outside; Unit high pressure steam energy consumption=comprehensive energy consumption/high pressure steam * folding energy coefficient; The pyrolysis furnace thermal efficiency=pyrolysis furnace effective energy/pyrolysis furnace supply energy; Energy consumption of compressor obtains according to consumption electric energy; Product yield=corresponding product/product population; The recovery=yield/total input amount; Entropy and
efficiency evaluation index computing formula as follows:
In ethylene production, the 1.0MPa steam that the consumption energy and power are sent outside in the energy is identical with the amount of sending outside with 0.4MPa steam consumption, in the calculating of comprehensive energy consumption, the energy consumption of this steam is ignored.Although but actual conditions are the not changes of two kinds of steam " amount ", " matter " there occurs change, and
change and the input temp of steam, output temperature is relevant with environment temperature, adopts
index can more effective monitoring energy consumption, thus realizes effective energy efficiency evaluation.
Wherein: T
0represent environment temperature, T
outrepresent system end vapor (steam) temperature, T
inrepresent the vapor (steam) temperature of the system that enters, unit: DEG C.
In raw material cracking section, boiler feed water produces middle energy medium extra high pressure steam at high temperature under high pressure, and therefore, for extra high pressure steam energy medium, the energy that boiler feed water is converted into extra high pressure steam is income
whole consumption energy of raw material cracking section are for paying
in order to calculate the energy utilization situation that intermediate medium transforms, definition extra high pressure steam medium
earning rate, is used for characterizing raw material cracking section and consumes the energy utilization rate that the energy produces extra high pressure steam.
Wherein: T
0represent environment temperature.
By analyzing ethylene production variety of energy sources, determine that ethylene production consumes the Species distributing of the energy, add entropy energy efficiency evaluation index, judge that the energy belongs to distributed energy (>=0.5) or the centralized energy (<0.5) according to result of calculation, and then determine main with can form finding out by energy link.
Wherein, m represents variety of energy sources sum, and i represents i-th kind of energy.
(3) by data statistic analysis to actual ethylene production, the time scale of index be year, season, the moon, ten days, week, day, class, hour, in real time; As table 2, carry out index distribution with time scale, thus determine distributed energy efficiency evaluation index system, realize ethylene production comprehensively, the energy efficiency evaluation of various dimensions.
Table 2
The present invention is owing to taking above technical scheme, it has the following advantages: 1, ethylene production is divided into the full section of ethylene production, raw material cracking section, Product recycling segregation section by the refrigerant change of ethylene production Commodity flow by the present invention, make index extraction more specifically, trickle, the energy efficiency evaluation comprehensive, scientifical for ethylene production provides important guarantee; 2, the present invention has taken into full account
with the energy efficiency evaluation index of entropy, carry out deep analysis to the energy " quality ", also carried out quantitative comparison to energy structure simultaneously and calculated, improving energy utilization rate for energy efficiency evaluation and plant area provides important reference; 3, the present invention is on the basis of ethylene production segmentation, carries out a secondary division from various dimensions to index, has accomplished, various dimensions energy efficiency evaluation multi-level to ethylene production; 4, the present invention is that index distributes again with time scale, form overall interconnected, the distributed energy efficiency evaluation index system of ethylene production, avoid the centrality of index and monistic shortcoming, make energy efficiency evaluation more clear, comprehensive, and then ethylene production is accomplished to the energy efficiency evaluation of at many levels-various dimensions.
Accompanying drawing explanation
Accompanying drawing 1 is ethylene production medium stream sketch
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
(1) as shown in Figure 1, the situation according to ethylene production medium stream carries out technique subsection: the sensing of the full section of ethylene production, raw material cracking section and Product recycling segregation section, and concrete division is as follows:
The full section of a, ethylene production: the overall process putting into two rare product output from raw material;
B, raw material cracking section: the overall process that raw material produces to pyrolysis gas through preheating, cracking;
C, Product recycling segregation section: pyrolysis gas through the process such as chilling, separation to the overall process obtaining two rare product;
(2) according to production monitoring and energy efficiency evaluation requirement, and send outside from energy resource consumption, Energy Intensity, energy conversion, the energy, entropy,
product yield, recovery various dimensions carry out classification to index, wherein the full section of ethylene production, raw material cracking section, Product recycling segregation section represent with A, B, C respectively, first class index and two-level index represent with a, b respectively, and each index number is shown in bracket internal label, as table 1:
Table 1
Wherein, comprehensive energy consumption, unit product comprehensive energy consumption, unit industrial added value energy consumption are provided by " comprehensive energy consumption calculates general rule GB/T2589-2008 "; Cracking severity and quench oil viscosity are obtained by hard measurement; Send comprehensive energy consumption outside to calculate according to " comprehensive energy consumption calculates general rule GB/T2589-2008 " according to sending variety of energy sources outside; Unit high pressure steam energy consumption=comprehensive energy consumption/high pressure steam * folding energy coefficient; The pyrolysis furnace thermal efficiency=pyrolysis furnace effective energy/pyrolysis furnace supply energy; Energy consumption of compressor obtains according to consumption electric energy; Product yield=corresponding product/product population; The recovery=yield/total input amount; Entropy and
efficiency evaluation index computing formula as follows:
In ethylene production, the 1.0MPa steam that the consumption energy and power are sent outside in the energy is identical with the amount of sending outside with 0.4MPa steam consumption, in the calculating of comprehensive energy consumption, the energy consumption of this steam is ignored.Although but actual conditions are the not changes of two kinds of steam " amount ", " matter " there occurs change, and
change and the input temp of steam, output temperature is relevant with environment temperature, adopts
index can more effective monitoring energy consumption, thus realizes effective energy efficiency evaluation.
Wherein: T
0represent environment temperature, T
outrepresent system end vapor (steam) temperature, T
inrepresent the vapor (steam) temperature of the system that enters, unit: DEG C.
In raw material cracking section, boiler feed water produces middle energy medium extra high pressure steam at high temperature under high pressure, and therefore, for extra high pressure steam energy medium, the energy that boiler feed water is converted into extra high pressure steam is income
whole consumption energy of raw material cracking section are for paying
in order to calculate the energy utilization situation that intermediate medium transforms, definition extra high pressure steam medium
earning rate, is used for characterizing raw material cracking section and consumes the energy utilization rate that the energy produces extra high pressure steam.
Wherein: T
0represent environment temperature.
By analyzing ethylene production variety of energy sources, determine that ethylene production consumes the Species distributing of the energy, add entropy energy efficiency evaluation index, judge that the energy belongs to distributed energy (>=0.5) or the centralized energy (<0.5) according to result of calculation, and then determine main with can form finding out by energy link.
Wherein, m represents variety of energy sources sum, and i represents i-th kind of energy.
(3) by data statistic analysis to actual ethylene production, the time scale of index be year, season, the moon, ten days, week, day, class, hour, in real time; As table 2, carry out index distribution with time scale, thus determine distributed energy efficiency evaluation index system, realize ethylene production comprehensively, the energy efficiency evaluation of various dimensions.
Table 2
Claims (1)
1. a distributed energy efficiency evaluation index system for ethylene production, is characterized in that,
(1) ethylene production is divided into the full section of ethylene production, raw material cracking section and Product recycling segregation section according to production medium stream, according to production monitoring and energy efficiency evaluation requirement, sends outside from energy resource consumption, Energy Intensity, energy conversion, the energy, entropy,
product yield, recovery various dimensions carry out classification to index; Wherein the full section of ethylene production, raw material cracking section, Product recycling segregation section represent with A, B, C respectively, and first class index and two-level index represent with a, b respectively, and each index number is shown in bracket internal label, as following table 1:
Wherein, comprehensive energy consumption, unit product comprehensive energy consumption, unit industrial added value energy consumption are provided by " comprehensive energy consumption calculates general rule GB/T2589-2008 "; Cracking severity and quench oil viscosity are obtained by hard measurement; Send comprehensive energy consumption outside according to sending variety of energy sources, cold Disengagement zone comprehensive energy consumption, thermal release district comprehensive energy consumption outside by calculating according to " comprehensive energy consumption calculates general rule GB/T2589-2008 " hot and cold district energy analysis; Unit high pressure steam energy consumption=comprehensive energy consumption/high pressure steam * folding energy coefficient; The pyrolysis furnace thermal efficiency=pyrolysis furnace effective energy/pyrolysis furnace supply energy; Energy consumption of compressor obtains according to consumption electric energy; Product yield=corresponding product/product population; The recovery=yield/total input amount; Entropy and
efficiency evaluation index computing formula as follows:
Wherein: T
0represent environment temperature, T
outrepresent system end vapor (steam) temperature, T
inrepresent the vapor (steam) temperature of the system that enters, unit: DEG C;
In raw material cracking section, boiler feed water produces middle energy medium extra high pressure steam at high temperature under high pressure, and therefore, for extra high pressure steam energy medium, the energy that boiler feed water is converted into extra high pressure steam is income
, whole consumption energy of raw material cracking section are for paying
; In order to calculate the energy utilization situation that intermediate medium transforms, definition extra high pressure steam medium
earning rate, is used for characterizing raw material cracking section and consumes the energy utilization rate that the energy produces extra high pressure steam;
Wherein: T
0represent environment temperature;
By analyzing ethylene production variety of energy sources, determine that ethylene production consumes the Species distributing of the energy, add entropy energy efficiency evaluation index, judge that the energy belongs to distributed energy (>=0.5) or the centralized energy (<0.5) according to result of calculation, and then determine main with can form find out by energy link;
Wherein, m represents variety of energy sources sum, and i represents i-th kind of energy;
(2) by data statistic analysis to actual ethylene production, the time scale of index be year, season, the moon, ten days, week, day, class, hour, in real time; As following table 2, carry out index distribution with time scale, thus determine distributed energy efficiency evaluation index system, realize ethylene production comprehensively, the energy efficiency evaluation of various dimensions:
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169010A (en) * | 2016-04-27 | 2016-11-30 | 机械工业仪器仪表综合技术经济研究所 | A kind of efficiency computational methods of cracking of ethylene system |
| CN108458886A (en) * | 2017-12-07 | 2018-08-28 | 石化盈科信息技术有限责任公司 | A kind of multiple practical operation energy efficiency evaluating method of ethylene unit |
| CN111523773A (en) * | 2020-04-03 | 2020-08-11 | 新奥数能科技有限公司 | Energy efficiency benchmarking method and device for comprehensive energy station, readable medium and electronic equipment |
| CN112330148A (en) * | 2020-11-04 | 2021-02-05 | 大连理工大学 | Environment sustainability evaluation method for preparing ethylene from light alkane |
-
2015
- 2015-09-28 CN CN201510628312.1A patent/CN105139155A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169010A (en) * | 2016-04-27 | 2016-11-30 | 机械工业仪器仪表综合技术经济研究所 | A kind of efficiency computational methods of cracking of ethylene system |
| CN108458886A (en) * | 2017-12-07 | 2018-08-28 | 石化盈科信息技术有限责任公司 | A kind of multiple practical operation energy efficiency evaluating method of ethylene unit |
| CN108458886B (en) * | 2017-12-07 | 2020-01-10 | 石化盈科信息技术有限责任公司 | Method for evaluating multiple actual operation energy efficiency of ethylene device |
| CN111523773A (en) * | 2020-04-03 | 2020-08-11 | 新奥数能科技有限公司 | Energy efficiency benchmarking method and device for comprehensive energy station, readable medium and electronic equipment |
| CN112330148A (en) * | 2020-11-04 | 2021-02-05 | 大连理工大学 | Environment sustainability evaluation method for preparing ethylene from light alkane |
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