CN109708516A - A kind of old heat exchange equipment Efficient utilization method for improving industrial heat exchange network - Google Patents
A kind of old heat exchange equipment Efficient utilization method for improving industrial heat exchange network Download PDFInfo
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- 238000007796 conventional method Methods 0.000 description 7
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- 230000006872 improvement Effects 0.000 description 4
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Abstract
A kind of old heat exchange equipment Efficient utilization method for improving industrial heat exchange network is primarily based on the condition of " minimum changes old heat exchange equipment ", point several priority collocation in successive steps heat exchange areas；Then it is divided to two priority that heat exchange unit is respectively configured using " heat exchange equipment maximally utilizes " principle on remaining heat exchanger；Finally under the premise of " meet demand ", new heat exchanger is matched for heat exchange area needed for residue.By layering, step by step match old heat exchange unit with required heat exchanger, to realize to the Optimum utilization of all old heat exchange equipments, substantially increases the area reclamation rate of old heat exchange equipment, reduces cost of investment.
Description
Technical field
The present invention relates to the energy saving optimizing fields of chemical process industry, especially heat exchange network system optimization transformation side
Face proposes a kind of old heat exchange equipment Efficient utilization method.
Background technique
Heat-exchange network is essential subsystem in Chemical Processing Systems, is energy regenerating benefit during high energy-consuming industry
Important component, the reasonability and high efficiency of design directly determine the energy consumption and economy of the procedures system.It is existing
There is network to be generally designed with energy conservation standard at that time for reference, but fast-developing pluralistic society, heat-exchange network is forced to need
Constantly to adapt to the requirements at the higher level of industrial reform and energy-saving and emission-reduction.Therefore, Optimizing Reconstruction existing network becomes promotion internetworking
It can, reduce one of energy resources waste, the effective way for reducing network investment cost.
The heat exchange equipment of active service has very big recycling potentiality, usually reuse used equipment to the maximum extent in transformation process
To reduce network investment cost.However, reuse method traditional at present is only with the difference of existing heat exchange area and required heat exchange area
It is worth size as used equipment reuse standard, there is the very big energy, the wasting of resources；And it is usually required that in configuration process each
It is poor that required area is made with all original heat exchange areas, and can judgement match, and result in a large amount of invalid computation.Therefore, it seeks
Ask a kind of low improvement cost, can the sufficiently old heat exchange equipment of reuse, while the heat exchange area configuration method for having calculation amount few, have
Great meaning.
Summary of the invention
In order to avoid the conventional method bring energy, the deficiency of the wasting of resources, the invention proposes one kind to make the best use of everything, surpasses
The old heat exchange equipment Efficient utilization method of the improvement industrial heat exchange network of Low investment cost.
In order to solve the above-mentioned technical problem, The technical solution adopted by the invention is as follows:
A kind of old heat exchange equipment Efficient utilization method for improving industrial heat exchange network, comprising the following steps:
Step 1: the old heat exchange equipment of reuse premised on minimum changes heat exchange area, process are as follows:
1.1) respectively by Hr、HoIn element descending arrangement；Wherein, HoOriginal heat exchanger area matrix is represented, element is used
O expression, unit m2；HrRepresent heat exchanger area matrix, element needed for being transformed is indicated with R, unit m2；
1.2) setting matching priority, enables n successively be equal to 4%, 10%, 18%, 28%, 40%, 54%, 80%；N table
Show the variation ratio of heat exchange area；
1.3) H is successively chosenrIn element R, and in HoFind so that | R-O | the smallest element O；
1.4) heat exchanger is configured according to different priorities；
If n is not more than 10%, judge whether R/O is more than or equal to 1-n and is less than or equal to 1+n.If so, matching R and O,
And it is rejected from corresponding matrix；Otherwise retain element；
If n is greater than 10%, judge whether R/O is more than or equal to 1-n and is less than or equal to 1.10.If so, matching R and O, and
It is rejected from corresponding matrix；Otherwise retain element；
1.5) H is updatedo、Hr, and repetitive operation 1.3) and 1.4), until HrIn element successively exhaust, execute next behaviour
Make；
1.6) repetitive operation 1.2)~1.5), until n=80%, if Hr、HoStep 2 is executed when being not empty, is otherwise jumped
It crosses Step 2 and directly executes Step 3；
Step 2: it is matched premised on used equipment maximally utilizes, process is as follows:
2.1) respectively by Hr、HoIn element arrange in descending order；
2.2) H is successively chosenrIn element R, make itself and HoIn each element O make quotient, obtain min (R/O)；
2.3) it is divided to two priority configuration heat exchangers:
1. element R and O are matched, and if min (R/O) is more than or equal to 0.2 and is less than or equal to 1.10 from respective face
It is rejected in product matrix；Otherwise enter next operation；
2. element R and O are matched, and is rejected from respective area matrix if min (R/O) is greater than 1.10；Otherwise
Reject element O；
2.4) H is updatedo、Hr, and repetitive operation 2.2) and 2.3), until HrIn element successively exhaust, perform the next step
Suddenly；
Step 3: matching new heat exchanger premised on meeting heat exchange area demand, and process is as follows:
3.1) judge HrIt whether is sky, if so, directly terminating to match；Otherwise next operation is executed；
3.2) corresponding new heat exchanger is configured for remaining required heat exchange area, completes matching.
Beneficial effects of the present invention:
The invention proposes a kind of methods that when improvement industrial heat exchange network, old heat exchange equipment is efficiently utilized.It is primarily based on
The condition of " minimum changes old heat exchange equipment ", point several priority collocation in successive steps heat exchange areas；Then it to remaining heat exchanger, uses
" heat exchange equipment maximally utilizes " principle is divided to two priority that heat exchange unit is respectively configured；Finally in the premise of " meet demand "
Under, new heat exchanger is matched for heat exchange area needed for residue.By layering, step by step old heat exchange unit and required heat exchanger are carried out
Matching substantially increases the area reclamation rate of old heat exchange equipment, reduces to realize to the Optimum utilization of all old heat exchange equipments
Cost of investment.
The present invention is provided with multiple priority, has paid the utmost attention to the matching of high priority, has avoided conventional method match party
Irrationality in formula, takes full advantage of used equipment, improves the economic benefit of Optimizing Reconstruction.Simultaneously by reject, retain and
The operation such as update, reduces a large amount of invalid computation in matching process, improves allocative efficiency.
Detailed description of the invention
Fig. 1 is the overall flow figure that used equipment makes full use of method；
Fig. 2 is original heat-exchange network structure chart in example；
Fig. 3 is the heat-exchange network structure chart obtained using the present invention；
Fig. 4 is the heat-exchange network structure chart obtained using conventional method.
Wherein, digital number represents the old heat exchange equipment that reuse is accordingly numbered in Fig. 3, Fig. 4, and alpha code represents newly-increased
Heat exchanger；Number is labeled as heat exchanger outlet temperature on material flow line, and unit is DEG C；Italic number represents heat-capacity flowrate, unit
It is kW DEG C-1。
Specific embodiment
To embody the validity and superiority of the present invention in practical applications, we are now elaborated by concrete case
Method.
Referring to Fig.1~Fig. 4, a kind of old heat exchange equipment Efficient utilization method for improving industrial heat exchange network, the case include 5
The hot logistics of item, 4 cold logistics, 1 hot public work and 1 cold public work.Its logistics data and heat exchanger cost calculation are public
Formula is shown in Table 1, and heat exchanger data are shown in Table 2, and existing heat-exchange network structure is as shown in Figure 2.The annual operating cost of existing heat-exchange network is
1.145×106$/y, duration of service are 6 years, Annual Percentage Rate 10%；The heat exchange area demand of transformation network is shown in Table 2.
Table 1
Used equipment reuse flow chart as shown in connection with fig. 1, the implementation steps that the present invention is applied to concrete case are as follows:
Step 1: the old heat exchange equipment of reuse premised on minimum changes heat exchange area, process are as follows:
1.1) to Hr、HoIn element descending arrangement, Hr=[1089.7 732.62 570.39 453.46 432.32
356.21 290.18 224.47 211.9 129.18 123.91 111.33 84.7 70.77 66.3 27.41]。 Ho=
[1182.2 794.96 735.56 591.29 572.92 425.08 260.93 250.12 247.2 167.07 148.04
112.92 91.76 37.96 23.24]；
1.2) setting matching priority, enables n successively take 4%, 10%, 18%, 28%, 40%, 54%, 80%；
1.3) H is successively chosenrIn element R, and in HoFind so that | R-O | the smallest element O；
1.4) heat exchanger is configured according to different priorities；
Operation 1.2)~1.4) specific implementation it is as follows:
N=4% is taken, 1. R=1089.7, O=1182.2, min | R-O |=92.5.R/O=0.9218 at this time.Due to n <
10%, it is known that R/O then retains R and O not within the scope of 1-n~1+n；
2. R=732.62, O=735.56, min | R-O |=2.94.R/O=0.9960 at this time.Due to n < 10%, it is known that
R/O is within the scope of 1-n~1+n, then the corresponding old heat exchanger of reuse O, and R and O is updated matrix after the rejecting of corresponding matrix.
There is Hr=[1089.7 570.39 453.46 432.32 356.21 290.18 224.47 211.9 129.18 123.91
111.33 84.7 70.77 66.3 27.41], Ho=[1182.2 794.96 591.29 572.92 425.08 260.93
250.12 247.2 167.07 148.04 112.92 91.76 37.96 23.24]；
……
1.5) repetitive operation 1.3) and 1.4), until HrIn element successively exhaust, H at this timer=[1089.7 453.46
356.21 290.18 224.47 211.9 129.18 123.91 84.7 70.77 66.3 27.41], Ho=[1182.2
794.96 591.29 260.93 250.12 247.2 167.07 148.04 91.76 37.96 23.24]；
……
1.6) repetitive operation 1.2)~1.5), until n=80%.H at this timer=[356.21 290.18 70.77 66.3
27.41], Ho=[794.96 260.93 37.96 23.24].Obvious HrAnd HoIt is not sky, executes Step 2.
Step 2: carrying out reuse premised on used equipment maximally utilizes, and process is as follows:
2.1) will drill work 1.6) updated area matrix Hr、HoIt arranges in descending order；
2.2) H is successively chosenrIn element R, make itself and HoIn each element O make quotient, find min (R/O)；
2.3) priority is divided to configure heat exchanger；
2.2) and 2.3) operation is embodied as follows:
1. R=356.21, O=794.96 are obtained min (R/O)=0.4481.Know min (R/O) in 0.2~1.10 model
In enclosing, then the corresponding old heat exchanger of reuse O, and R and O is updated into matrix after the rejecting of corresponding matrix.There is H at this timer=[290.18
70.77 66.3 27.41], Ho=[260.93 37.96 23.24]；
2. R=290.18, O=260.93 are obtained min (R/O)=1.1121.It knows that min (R/O) is greater than 1.10, then returns
Matrix is updated after the rejecting of corresponding matrix with the corresponding old heat exchanger of O, and by R and O.There is H at this timer=[70.77 66.3
27.41], Ho=[37.96 23.24]；
……
2.4) repetitive operation 2.2) and 2.3), until HrIn element successively exhaust.Area matrix is updated at this time: Hr=
[27.41], Ho=[].
Step 3: matching new heat exchanger premised on meeting heat exchange area demand, and process is as follows:
3.1) obvious HrIt is not sky, that is, executes next operation；
3.2) due to Hr=[27.41], so configuration area is 27.41m2New heat exchanger, matching complete.
Using the present invention, obtained the matching way arranged such as 2 4-6 of table by executing above-mentioned steps, so draw out as
Heat-exchange network structure chart shown in Fig. 3.
The heat exchange area generallyd use respectively by the present invention and at present for prominent effectiveness of the invention and superiority, table 2
The resulting matching scheme of matching process is compared.Only with institute after element descending arrangement in the product matrix of conventional method opposite
It is standard reuse existing equipment, the matching scheme finally obtained such as table 2 that need area, which be the 20%~110% of existing heat exchanger area,
Shown in 7-8 column, corresponding heat-exchange network structure is shown in Fig. 4 after this method is implemented.Pass through analysis matching scheme and calculate and is transformed into
This, the present invention, which is used for Retrofit of Heat Exchanger Networks with conventional method, can be obtained result as shown in table 3.
Table 2
Table 3
The transformation of the heat exchange area matching scheme and table 3 of consolidated statement 2 is as a result, available: configuring for legacy network identical
Required heat exchange area when, need newly-increased heat exchanger quantity less using the more traditional method of the present invention, need newly-increased change
Hot device area is only the 38% of conventional method, and the utilization rate of used equipment is higher, when investment cost is down to using conventional method
53%, making full use of for used equipment is realized, the cost of investment of Retrofit of Heat Exchanger Networks is reduced.Therefore, in heat exchange network optimization
Network used equipment reuse ratio will be effectively improved using the method for the invention in transformation process, reduce improvement cost.
Claims (1)
1. it is a kind of improve industrial heat exchange network old heat exchange equipment Efficient utilization method, which is characterized in that the method includes with
Lower step:
Step 1: the old heat exchange equipment of reuse premised on minimum changes heat exchange area, process are as follows:
1.1) respectively by Hr、HoIn element descending arrangement；Wherein, HoRepresent original heat exchanger area matrix, element O table
Show, unit m2；HrRepresent heat exchanger area matrix, element needed for being transformed is indicated with R, unit m2；
1.2) setting matching priority, enables n successively be equal to 4%, 10%, 18%, 28%, 40%, 54%, 80%；N indicates heat exchange
The variation ratio of area；
1.3) H is successively chosenrIn element R, and in HoFind so that | R-O | the smallest element O；
1.4) heat exchanger is configured according to different priorities；
If n is not more than 10%, judge whether R/O is more than or equal to 1-n and is less than or equal to 1+n, if so, matching R and O, and will
It is rejected from corresponding matrix；Otherwise retain element；
If n be greater than 10%, judge R/O whether be more than or equal to 1-n and be less than or equal to 1.10, if so, matching R and O, and by its
It is rejected from corresponding matrix；Otherwise retain element；
1.5) H is updatedo、Hr, and repetitive operation 1.3) and 1.4), until HrIn element successively exhaust, execute next operation；
1.6) repetitive operation 1.2)~1.5), until n=80%, if Hr、HoStep 2 is executed when being not empty, is otherwise skipped
Step 2 directly executes Step 3；
Step 2: it is matched premised on used equipment maximally utilizes, process is as follows:
2.1) respectively by Hr、HoIn element arrange in descending order；
2.2) H is successively chosenrIn element R, make itself and HoIn each element O make quotient, obtain min (R/O)；
2.3) it is divided to two priority configuration heat exchangers:
1. element R and O are matched, and if min (R/O) is more than or equal to 0.2 and is less than or equal to 1.10 from respective face product moment
It is rejected in battle array；Otherwise enter next operation；
2. element R and O are matched, and is rejected from respective area matrix if min (R/O) is greater than 1.10；Otherwise it rejects
Element O；
2.4) H is updatedo、Hr, and repetitive operation 2.2) and 2.3), until HrIn element successively exhaust, perform the next step rapid；
Step 3: matching new heat exchanger premised on meeting heat exchange area demand, and process is as follows:
3.1) judge HrIt whether is sky, if so, directly terminating to match；Otherwise next operation is executed；
3.2) corresponding new heat exchanger is configured for remaining required heat exchange area, completes matching.
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-
2018
- 2018-11-14 CN CN201811351271.6A patent/CN109708516B/en active Active
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| WO2011044431A2 (en) * | 2009-10-08 | 2011-04-14 | Saudi Arabian Oil Company | Systems, program product, and methods for synthesizing heat exchanger networks that exhibit life-cycle switchability and flexibility under all possible combinations of process variations |
| CN101777083A (en) * | 2009-12-15 | 2010-07-14 | 浙江工业大学 | Heat exchange network optimization synthesis method based on Delta T-contribution value correction |
| CN102939605A (en) * | 2010-04-26 | 2013-02-20 | 沙特阿拉伯石油公司 | Methods for heat exchanger network energy efficiency assessment and lifetime retrofit |
| CN107665280A (en) * | 2017-09-27 | 2018-02-06 | 浙江工业大学 | A kind of Retrofit of Heat Exchanger Networks optimization method based on performance simulation |
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