CN113958492B - Gas holder compressor operation method and system based on coking device decoking cycle - Google Patents
Gas holder compressor operation method and system based on coking device decoking cycle Download PDFInfo
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- CN113958492B CN113958492B CN202111083222.0A CN202111083222A CN113958492B CN 113958492 B CN113958492 B CN 113958492B CN 202111083222 A CN202111083222 A CN 202111083222A CN 113958492 B CN113958492 B CN 113958492B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005235 decoking Methods 0.000 title claims abstract description 28
- 238000004939 coking Methods 0.000 title abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 409
- 239000002737 fuel gas Substances 0.000 claims abstract description 92
- 238000005457 optimization Methods 0.000 claims abstract description 57
- 230000008901 benefit Effects 0.000 claims description 63
- 238000005520 cutting process Methods 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 1
- 239000000523 sample Substances 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 239000000571 coke Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 101100129500 Caenorhabditis elegans max-2 gene Proteins 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 101100083446 Danio rerio plekhh1 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
Abstract
The invention relates to a method and a system for operating a gas holder compressor based on a decoking cycle of a coking device, wherein the method comprises the following steps: acquiring running state information of a compressor connected with a preassigned gas holder for optimization, condition information of a compressor back-way return gas holder and state information of additional supplementary fuel gas in a high-pressure gas system; judging whether the condition that the compressor cannot operate and optimize is met or not based on the running state information of the compressor connected with the pre-designated gas holder for optimizing, the condition information of the back-way return of the compressor to the gas holder and the state information of additional supplementary fuel gas in the high-pressure gas system, and outputting the current running state and load if the condition that the compressor cannot operate and optimize is met; if not, the corresponding strategy is adopted to reduce the operation load of the compressors or to reduce the supplementary fuel gas or to shut down any one of the compressors connected with the pre-designated gas holder for optimization.
Description
Technical Field
The invention relates to the technical field of oil refining and chemical industry, in particular to a method and a system for operating a gas holder compressor based on a coking unit decoking cycle.
Background
In the actual operation of the device, the high-pressure gas system in the oil refining industry has the conditions of time change of components, large heat value fluctuation and unstable pressure. The gas holder acts as a low pressure gas trap in the refinery. The conditions of unstable gas and unstable heat value are aggravated clearly in the processes of tower cutting, decoking and coke cutting of the delayed coking device. The coking device achieves the aim of lightening heavy oil through thermal cracking and condensation reaction, and a large amount of coking dry gas can be generated in the production process of the coking device, and can be used as fuel gas while meeting the requirements of raw materials for hydrogen production. Coke is continuously accumulated in the coke drum, so that the coke drum needs to be periodically cut. When the coke tower is used for large steam blowing and small steam blowing, a large amount of hydrocarbon-containing steam is generated and is collected in the gas holder. The gas tank is boosted and desulfurized by a gas tank compressor and then is combined into a high-pressure gas system to be used as fuel.
However, in the existing coking device in China, intermittent operation is still adopted in the operation of the coke tower, the optimization operation of gas holder compression based on the coking device decoking cycle is not considered, meanwhile, most of the coke-cutting process adopts a hydraulic power, and generated hydrocarbon-containing steam and the like are collected in the gas holder, and the gas contains water vapor, so that the heat value of the part of gas is not high. The coking dry gas has higher heat value, but the amount of the coking dry gas generated by the new tower which is incorporated into a gas pipe network can be reduced when the new tower is started in the process of cutting and decoking of the coking device, and the coking dry gas has certain impact on the stability of the gas pipe network.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-described shortcomings and drawbacks of the prior art, the present invention provides a method and system for operating a gas holder compressor based on a coker decoking cycle.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps: a method of operating a gas holder compressor based on a coker decoking cycle, the method being applied to a gas holder compressor apparatus comprising a coker, a pre-designated gas holder for emergency and a pre-designated gas holder for optimization; the preassigned gas holder for optimization is connected with a plurality of gas holder compressors; the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are the same gas holder or different gas holders; the method comprises the following steps:
s1, acquiring running state information of a compressor connected with the preassigned gas holder for optimization, condition information of a compressor back-way return gas holder and state information of additional supplementary fuel gas in a high-pressure gas system;
the operation state information of the compressor currently connected with the pre-designated gas holder for optimization comprises: the number of compressors started;
the condition information of the compressor back return gas holder comprises: information on whether the compressor back-way fuel gas returns to the gas holder;
the state information of the additional supplementary fuel gas in the high-pressure gas system comprises: information whether fuel gas is additionally supplemented in the high-pressure gas system;
s2, judging whether the condition that the compressor cannot operate and optimize is met or not based on the running state information of the compressor connected with the pre-designated gas holder, the condition information of the gas holder returned by the compressor, and the state information of additional supplementary fuel gas in the high-pressure gas system, and outputting the current running state and load if the condition that the compressor cannot operate and optimize is met;
and S3, if the operation state information does not accord with the operation state information of the compressor connected with the pre-designated gas holder for optimization, the condition information of the compressor returned to the gas holder in a back way, and the state information of additional supplementary fuel gas in the high-pressure gas system, reducing the operation load of the compressor or reducing the supplementary fuel gas or closing any one of the compressors connected with the pre-designated gas holder for optimization by adopting a preset strategy.
Preferably, the method comprises the steps of,
conditions under which the compressor cannot be operated to optimize include: any one of the first case, the second case, the third case, the fourth case, and the fifth case;
the first situation is: the compressor is not started;
the second case is: only 1 compressor is started, meanwhile, the back way of the compressor does not return to the gas holder, and the high-pressure gas pipe network is additionally supplemented with fuel gas;
the third case is: only 1 compressor is started, and meanwhile, the fuel gas in the rear path of the compressor is not returned to the gas holder, and the high-pressure gas pipe network is not additionally supplemented with the fuel gas;
the fourth case is: the number of compressors is more than 1, and meanwhile, the gas in the rear path of the compressors is not returned to the gas holder and fuel gas is additionally supplemented;
the fifth case is: the number of compressors on is greater than 1, and the compressor back gas is not returned to the gas holder and is not additionally supplemented with fuel gas.
Preferably, the step S3 includes:
and if the running state information of the compressor currently connected with the preassigned gas holder for optimizing, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: only 1 compressor or more than 1 compressor is started, and meanwhile, when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is additionally supplemented with the fuel gas, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile Acquiring a first time Ts;
obtaining current frequency n of compressor 2 And according to the preset frequency n of the compressor after reducing the running load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a first benefit M 1； and ,
obtaining the current volume flow V of the fuel gas 1 And according to the current volume flow V of the fuel gas 1 Volume flow V after reduction of preset fuel gas 2 Monovalent C of fuel gas g Obtaining a second benefit M 2 ；
Comparing the first benefit M 1 And second benefit M 2 Acquiring a first comparison result;
if the first comparison result is the first benefit M 1 Greater than the second benefit M 2 Reducing the compressor operating load and the preset frequency n 1 Corresponding to the above;
if the first comparison result is the first benefit M 1 Less than the second benefit M 2 And reducing the amount of the supplementary fuel gas according to the heat value balance to balance the heat in the high-pressure gas system.
Preferably, the method comprises the steps of,
the first benefit M 1 Obtained by the formula (1);
the formula (1) is:
the second benefit M 2 Obtained by the formula (2);
the formula (2) is:
M 2 ＝(V 1 -V 2 )×T s ×C g 。
preferably, the step S3 includes:
if the running state information of the current compressor, the condition information of the compressor back return gas holder and the high-pressure gas system areThe state information of the internal additional supplementary fuel gas is: only 1 compressor is started, and when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is not additionally supplemented with the fuel gas, the preset strategy is as follows: reducing the compressor operating load and the predetermined frequency n 1 Corresponding to the above.
Preferably, the step S3 includes:
if the running state information of the current compressor, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: the number of compressors is greater than 1, and when the fuel gas is returned to the gas holder after the compressors and the fuel gas is not supplemented, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile Acquiring a first time Ts;
obtaining current frequency n of compressor 2 And according to the preset frequency n of the compressor after reducing the running load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a third benefit M 3； and ,
according to rated power P of compressor motor, said first time Ts and electricity price C k Obtaining the fourth benefit M 4 ；
Comparison of third benefit M 3 And fourth benefit M 4 Obtaining a second comparison result;
if the second comparison result is that the third benefit M3 is greater than the fourth benefit M4, determining that 1 compressor reduces the operation load;
and if the second comparison result is that the third benefit M3 is smaller than the fourth benefit M4, any one of the compressors connected with the pre-designated gas holder for optimization is closed.
Preferably, the method comprises the steps of,
the first time Ts is obtained by adopting a formula (3);
the formula (3) is:
wherein the pre-specified gas volume V which is used for optimizing the gas holder and can be stored at present is obtained by a formula (3-1);
the formula (3-1) is:
V＝(H max -H)/Hs×Vs (3-1)；
H max representing a pre-specified critical height for the optimized cabinet;
h represents a pre-designated current height of the gas holder for optimization;
hs represents a storage height of a gas holder designated in advance for optimization;
vs represents a pre-specified storage volume for the optimized gas;
wherein the total volume F of the gas in the gas inlet cabinet in the first 1 hour from the current time in Obtained from formula (3-2);
the formula (3-2) is:
m represents m strands of gas of the total gas inlet cabinet;
Fin i representing the gas volume of the ith gas inlet cabinet;
wherein ,
t1 represents the first 1 hour from the current time;
t2 represents the current time;
fin i representing the gas flow of the ith air inlet cabinet;
n represents the integral segmentation number, N is more than or equal to 2, and N is an even number;
wherein the total volume F of the gas outlet cabinet gas within the first 1 hour from the current time out Obtained from equation (3-3);
the formula (3-3) is:
k represents k gas of the total gas outlet cabinet;
Fout j representing the gas volume of the j-th gas outlet cabinet;
fout j representing the gas flow of the j-th gas outlet cabinet;
wherein the non-monitored low pressure gas discharge V Low tile Obtained from the formula (3-4);
the formula (3-4) is:
H 1 is the height of the gas holder at the first 1 hour.
Preferably, the method comprises the steps of,
the third benefit M 3 Calculating according to a formula (4) under the condition that the first time Ts is smaller than the distance tower cutting time;
the distance tower cutting time is as follows: t (T) 1 -t2；
The T is 1 Decoking time for the next cut tower of the coker;
the formula (4):
the fourth benefit M 4 Calculating according to a formula (5) under the condition that the first time Ts is longer than the distance tower cutting time;
the formula (5):
M 4 ＝P×T s ×C k 。
preferably, the method further comprises:
s4, judging the undetected low-pressure gas emission V Low tile Whether the value is larger than a preset standard value or not, and acquiring a judging result;
if the judgment result is that the low-pressure gas emission V is not monitored Low tile If the emission quantity of the low-pressure gas is larger than the preset standard value, determining that the emission quantity of the low-pressure gas which is not monitored is in an abnormal state;
if the judgment result is that the low-pressure gas emission V is not monitored Low tile And if the emission quantity of the low-pressure gas is smaller than the preset standard value, determining that the emission quantity of the non-monitored low-pressure gas is in a normal state.
In another aspect, the present embodiments also provide a gas holder compressor operating system based on a coker decoking cycle, the system comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing a method of operating a gas holder compressor based on a coker decoking cycle as set forth in any one of the above.
(III) beneficial effects
The beneficial effects of the invention are as follows: according to the gas holder compressor operation method and system based on the coking device decoking cycle, due to the fact that a preset strategy corresponding to the running state information of a compressor connected with the pre-designated gas holder, the condition information of a compressor back-way return gas holder and the state information of additional supplementary fuel gas in a high-pressure gas system is adopted, the running load of the compressor is reduced or the supplementary fuel gas is reduced or any one of the compressors connected with the pre-designated gas holder is closed, compared with the prior art, the coking device decoking cycle is considered, excess gas can be buffered by a gas holder container, when the coking device decoking is not achieved, the surplus gas is stored by a spare space of the gas holder, the buffered and collected low-pressure gas is boosted by the compressor and is used in a high-pressure gas system, so that the supplementary quantity of the additional fuel gas is reduced, and the economic and industrial benefits are improved.
Drawings
FIG. 1 is a flow chart of a method of operating a gas holder compressor based on a coker decoking cycle in accordance with the present invention;
FIG. 2 is a schematic diagram of a gas holder compressor operating system based on coker decoking cycles in accordance with the present invention.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, the present embodiment provides a method of operating a gas holder compressor based on a coker decoking cycle, characterized in that the method is applied to a gas holder compressor apparatus including a coker, a pre-designated gas holder for emergency, and a pre-designated gas holder for optimization; the preassigned gas holder for optimization is connected with a plurality of gas holder compressors; the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are the same gas holder or different gas holders; the method comprises the following steps:
s1, acquiring running state information of a compressor connected with the preassigned gas holder for optimization, condition information of a compressor back-way return gas holder and state information of additional supplementary fuel gas in a high-pressure gas system.
The operation state information of the compressor currently connected with the pre-designated gas holder for optimization comprises: the number of compressors turned on.
The condition information of the compressor back return gas holder comprises: information about whether the compressor back-pass fuel gas is returned to the gas holder.
The fuel gas in the high-pressure gas system in the refinery is mainly used for boilers, heating furnaces and the like, and is a main system for providing fuel gas.
The low-pressure gas system mainly comprises a gas holder, a gas holder compressor and a pipe network thereof, wherein the gas holder gas is compressed and boosted by the compressor and then is used as fuel by being combined with the high-pressure gas system, so that the full utilization of the low-pressure gas is realized.
The state information of the additional supplementary fuel gas in the high-pressure gas system comprises: information on whether the fuel gas is additionally supplemented in the high-pressure gas system.
In a specific application of this embodiment, both the gas cabinet for optimization and the gas cabinet for emergency are specified by the user. The compressor and the air tank are not connected one-to-one. One cabinet is often connected to a plurality of compressors, but the number is not fixed, but is determined on site.
S2, judging whether the condition that the compressor cannot operate and optimize is met or not based on the running state information of the compressor currently connected with the pre-designated gas holder for optimizing, the condition information of the compressor back-way returning gas holder and the state information of additional supplementary fuel gas in the high-pressure gas system, and outputting the current running state and load if the condition is met.
And S3, if the operation state information does not accord with the operation state information of the compressor connected with the pre-designated gas holder for optimization, the condition information of the compressor returned to the gas holder in a back way, and the state information of additional supplementary fuel gas in the high-pressure gas system, reducing the operation load of the compressor or reducing the supplementary fuel gas or closing any one of the compressors connected with the pre-designated gas holder for optimization by adopting a preset strategy.
In a practical application of the present embodiment, the conditions under which the compressor cannot perform operation optimization include: any one of the first case, the second case, the third case, the fourth case, and the fifth case.
The first situation is: the compressor is not turned on.
The second case is: only 1 compressor is started, and meanwhile, the back path of the compressor does not return to the gas holder, and the high-pressure gas pipe network is additionally supplemented with fuel gas.
The third case is: only 1 compressor is started, and meanwhile, the fuel gas in the back of the compressor is not returned to the gas holder, and the high-pressure gas pipe network is not additionally supplemented with the fuel gas.
The fourth case is: the number of compressors on is greater than 1, and meanwhile, the gas in the back of the compressors is not returned to the gas holder and fuel gas is additionally supplemented.
The fifth case is: the number of compressors on is greater than 1, and the compressor back gas is not returned to the gas holder and is not additionally supplemented with fuel gas.
In practical application of this embodiment, the step S3 includes: and if the running state information of the compressor currently connected with the preassigned gas holder for optimizing, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: only 1 compressor or more than 1 compressor is started, and meanwhile, when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is additionally supplemented with the fuel gas, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile The first time Ts is acquired.
Obtaining current frequency n of compressor 2 And according to the preset frequency n of the compressor after reducing the running load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a first benefit M 1 The method comprises the steps of carrying out a first treatment on the surface of the And obtaining the current volume flow V of the fuel gas 1 And according to the current volume flow V of the fuel gas 1 Volume flow V after reduction of preset fuel gas 2 Monovalent C of fuel gas g Obtaining a second benefit M 2 ；
Comparing the first benefit M 1 And second benefit M 2 A first comparison result is obtained.
If the first comparison result is the first benefit M 1 Greater than the second benefit M 2 Reducing the compressor operating load and the preset frequency n 1 Corresponding to the above.
If the first comparison result is the first benefit M 1 Less than the second benefit M 2 Then the amount of the supplementary fuel gas is reduced according to the heat value balance, so that the high-pressure gas systemThe internal heat is balanced.
The heat value balance calculation is to calculate different fuel gas amounts by taking the principle that the heat generated by burning fuel gas with different components is equal.
In a practical application of the embodiment, the first benefit M 1 Obtained by the formula (1);
the formula (1) is:
the second benefit M 2 Obtained by the formula (2).
The formula (2) is:
M 2 ＝(V 1 -V 2 )×T s ×C g 。
in practical application of this embodiment, the step S3 includes:
if the running state information of the current compressor, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: only 1 compressor is started, and when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is not additionally supplemented with the fuel gas, the preset strategy is as follows: reducing the compressor operating load and the predetermined frequency n 1 Corresponding to the above.
In practical application of this embodiment, the step S3 includes:
if the running state information of the current compressor, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: the number of compressors is greater than 1, and when the fuel gas is returned to the gas holder after the compressors and the fuel gas is not supplemented, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile The first time Ts is acquired.
Obtaining current frequency n of compressor 2 And according to the preset frequency n of the compressor after reducing the running load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a third benefit M 3 The method comprises the steps of carrying out a first treatment on the surface of the And according to rated power P of compressor motor, the first time Ts and electricity price C k Obtaining the fourth benefit M 4 。
Comparison of third benefit M 3 And fourth benefit M 4 And obtaining a second comparison result.
If the second comparison result is the third benefit M 3 Greater than the fourth benefit M 4 It is determined that 1 compressor reduces the operation load.
If the second comparison result is the third benefit M 3 Less than the fourth benefit M 4 Any one of the compressors connected to the pre-designated gas holder for optimization is turned off. In a specific application of this embodiment, this refers to any compressor that is in operation in connection with the pre-designated gas holder for optimization.
In practical application of the embodiment, the first time Ts is obtained by adopting a formula (3);
the formula (3) is:
wherein the pre-specified gas volume V which is used for optimizing the gas holder and can be stored at present is obtained by a formula (3-1);
the formula (3-1) is:
V＝(H max -H)/Hs×Vs (3-1)；
H max representing a pre-specified critical height for the optimized cabinet.
In a specific application of this embodiment, if the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are the same gas holder, the critical height to be set is H max1 If the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are different gas holders, the critical height to be set is H max2 And the critical height is H max2 Greater than critical height H max1 (the dimensions of the gas holder are the same in different cases), specifically, if the total gas holder height is 18m, the critical height may be set to 16m when the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are different gas holders; when the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are the same gas holder, the critical height may be set to 10m.
H represents a pre-specified current height of the gas cabinet for optimization, specifically the height of the gas stored in the gas cabinet, and specifically, the following general conditions are adopted: dry gas tanks are typically the stroke height of the piston. The current height is obtained, namely the current gas quantity stored in the cabinet can be obtained through calculation. The greater the gas stored in the gas cabinet, the greater the height of the gas cabinet. The current height is the height in the current gas holder, and the height data can be directly obtained from the monitoring system.
Hs represents a pre-specified storage height for the optimized cabinet.
Vs represents a pre-specified storage volume for the optimized gas.
Wherein, the time is within the first 1 hour from the current timeTotal volume F of gas in the gas inlet tank in Obtained from the formula (3-2).
The formula (3-2) is:
m represents m strands of gas of the total gas inlet cabinet.
Fin i Representing the gas volume of the ith gas inlet cabinet.
wherein ,
t1 represents the first 1 hour from the current time.
t2 represents the current time.
fin i Representing the gas flow of the ith gas inlet plenum.
N represents the integral segmentation number, N is more than or equal to 2, and N is an even number.
Wherein the total volume F of the gas outlet cabinet gas within the first 1 hour from the current time out Obtained from the formula (3-3).
The formula (3-3) is:
k represents k gas streams of the total gas outlet cabinet.
Fout j Representing the gas volume of the j-th gas outlet cabinet.
fout j Representing the gas flow of the j-th gas outlet cabinet.
Wherein the non-monitored low pressure gas discharge V Low tile Obtained from the formula (3-4).
The formula (3-4) is:
H 1 is the height of the gas holder at the first 1 hour.
In a practical application of the embodiment, the third benefit M 3 And (3) calculating according to a formula (4) under the condition that the first time Ts is smaller than the distance tower cutting time.
The distance tower cutting time is as follows: t (T) 1 -t2。
The T is 1 Decoking time for the next cut tower of the coker.
For example, if the current time is 13 points 1, the next cut-off time of the coker is 20 points 1, then the distance cut-off time is 7 hours, i.e., T 1 -t2. If the current time is 13 points of No. 1 and the next coke-cutting time of the coking unit is 20 points of No. 2, the distance from the coke-cutting time is 31 hours, namely the next coke-cutting time of the coking unit is from the current time period, T 1 -t2。
The formula (4):
the fourth benefit M 4 Calculating according to a formula (5) under the condition that the first time Ts is longer than the distance tower cutting time;
the formula (5):
M 4 ＝P×T s ×C k 。
in a practical application of this embodiment, the method further includes:
s4, judging the undetected low-pressure gas emission V Low tile And whether the judgment result is larger than a preset standard value or not is obtained.
If the judgment result is that the low-pressure gas emission V is not monitored Low tile Greater than the pre-determinedAnd determining that the undetected low-pressure gas emission is in an abnormal state if the standard value is set.
If the judgment result is that the low-pressure gas emission V is not monitored Low tile And if the emission quantity of the low-pressure gas is smaller than the preset standard value, determining that the emission quantity of the non-monitored low-pressure gas is in a normal state.
In this embodiment, when in an abnormal state, a reference may be provided for a field person, so as to find out a cause and solve a problem.
In another aspect, referring to fig. 2, the present embodiment also provides a gas holder compressor operating system based on a coker decoking cycle, the system comprising:
at least one processor; and at least one memory communicatively coupled to the processor, wherein the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing a method of operating a gas holder compressor based on a coker decoking cycle as described in any of the above.
According to the gas holder compressor operation method based on the coking device decoking cycle, due to the fact that a preset strategy corresponding to the operation state information of the compressor currently connected with the pre-designated gas holder for optimizing, the condition information of the compressor back-way returned gas holder and the state information of additional supplementary fuel gas in the high-pressure gas system is adopted, the operation load of the compressor is reduced or the supplementary fuel gas is reduced or any one of the compressors connected with the pre-designated gas holder for optimizing is closed, compared with the prior art, the method can buffer surplus gas by using a gas holder container, store surplus gas by using the spare space of the gas holder when the coking device decoking is not achieved, boost the buffered and collected low-pressure gas by using the compressor and use the boosted gas in the high-pressure gas system, so that the supplementary charge of the additional fuel gas is reduced, and the economic and industrial benefits are improved.
According to the operation method of the gas holder compressor based on the coking device decoking cycle, the stability of a high-pressure gas pipe network system is improved, and the operation energy consumption of the gas holder compressor is reduced. Meanwhile, the power consumption of the compressor is reduced in one operation period, the operation load of the desulfurizing tower is reduced, the soft measurement of the undetected low-pressure gas emission is realized, the operation guidance of the gas holder compressor is provided, and the method has higher economic and industrial benefits.
Since the system described in the foregoing embodiments of the present invention is a system for implementing the method of the foregoing embodiments of the present invention, those skilled in the art will be able to understand the specific structure and modification of the system based on the method of the foregoing embodiments of the present invention, and thus will not be described in detail herein. All systems used in the methods of the above embodiments of the present invention are within the scope of the present invention.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the terms first, second, third, etc. are for convenience of description only and do not denote any order. These terms may be understood as part of the component name.
Furthermore, it should be noted that in the description of the present specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with the embodiment or example being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art upon learning the basic inventive concepts. Therefore, the appended claims should be construed to include preferred embodiments and all such variations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, the present invention should also include such modifications and variations provided that they come within the scope of the following claims and their equivalents.
Claims (10)
1. A method of operating a gas holder compressor based on a coker decoking cycle, characterized in that the method is applied to a gas holder compressor apparatus comprising a coker, a pre-designated gas holder for emergency and a pre-designated gas holder for optimization; the preassigned gas holder for optimization is connected with a plurality of gas holder compressors; the pre-designated gas holder for emergency and the pre-designated gas holder for optimization are the same gas holder or different gas holders; the method comprises the following steps:
s1, acquiring running state information of a compressor connected with the preassigned gas holder for optimization, condition information of a compressor back-way return gas holder and state information of additional supplementary fuel gas in a high-pressure gas system;
the operation state information of the compressor currently connected with the pre-designated gas holder for optimization comprises: the number of compressors started;
the condition information of the compressor back return gas holder comprises: information on whether the compressor back-way fuel gas returns to the gas holder;
the state information of the additional supplementary fuel gas in the high-pressure gas system comprises: information whether fuel gas is additionally supplemented in the high-pressure gas system;
s2, judging whether the condition that the compressor cannot operate and optimize is met or not based on the running state information of the compressor connected with the pre-designated gas holder, the condition information of the gas holder returned by the compressor, and the state information of additional supplementary fuel gas in the high-pressure gas system, and outputting the current running state and load if the condition that the compressor cannot operate and optimize is met;
and S3, if the operation state information does not accord with the operation state information of the compressor connected with the pre-designated gas holder for optimization, the condition information of the compressor returned to the gas holder in a back way, and the state information of additional supplementary fuel gas in the high-pressure gas system, reducing the operation load of the compressor or reducing the supplementary fuel gas or closing any one of the compressors connected with the pre-designated gas holder for optimization by adopting a preset strategy.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
conditions under which the compressor cannot be operated to optimize include: any one of the first case, the second case, the third case, the fourth case, and the fifth case;
the first situation is: the compressor is not started;
the second case is: only 1 compressor is started, meanwhile, the back way of the compressor does not return to the gas holder, and the high-pressure gas pipe network is additionally supplemented with fuel gas;
the third case is: only 1 compressor is started, and meanwhile, the fuel gas in the rear path of the compressor is not returned to the gas holder, and the high-pressure gas pipe network is not additionally supplemented with the fuel gas;
the fourth case is: the number of compressors is more than 1, and meanwhile, the gas in the rear path of the compressors is not returned to the gas holder and fuel gas is additionally supplemented;
the fifth case is: the number of compressors on is greater than 1, and the compressor back gas is not returned to the gas holder and is not additionally supplemented with fuel gas.
3. The method according to claim 2, wherein the step S3 comprises:
and if the running state information of the compressor currently connected with the preassigned gas holder for optimizing, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: only 1 compressor or more than 1 compressor is started, and meanwhile, when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is additionally supplemented with the fuel gas, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow rate fa of the compressor connected to the pre-designated gas holder for optimization within the first 1 hour from the current time,Non-monitored low-pressure gas discharge V Low tile Acquiring a first time Ts;
obtaining current frequency n of compressor 2 And according to the preset frequency n of the compressor after reducing the running load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a first benefit M 1； and ,
obtaining the current volume flow V of the fuel gas 1 And according to the current volume flow V of the fuel gas 1 Volume flow V after reduction of preset fuel gas 2 Monovalent C of fuel gas g Obtaining a second benefit M 2 ；
Comparing the first benefit M 1 And second benefit M 2 Acquiring a first comparison result;
if the first comparison result is the first benefit M 1 Greater than the second benefit M 2 Reducing the compressor operating load and the preset frequency n 1 Corresponding to the above;
if the first comparison result is the first benefit M 1 Less than the second benefit M 2 And reducing the amount of the supplementary fuel gas according to the heat value balance to balance the heat in the high-pressure gas system.
4. The method of claim 3, wherein the step of,
the first benefit M 1 Obtained by the formula (1);
the formula (1) is:
the second benefit M 2 Obtained by the formula (2);
the formula (2) is:
M 2 ＝(V 1 -V 2 )×T s ×C g 。
5. the method according to claim 2, wherein the step S3 comprises:
if the running state information of the current compressor, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: only 1 compressor is started, and when fuel gas returns to the gas holder after the compressors and the high-pressure gas pipe network is not additionally supplemented with the fuel gas, the preset strategy is as follows: reducing the compressor operating load and the predetermined frequency n 1 Corresponding to the above.
6. The method according to claim 2, wherein the step S3 comprises:
if the running state information of the current compressor, the condition information of the compressor back-way return gas holder and the state information of the additional supplementary fuel gas in the high-pressure gas system are as follows: the number of compressors is greater than 1, and when the fuel gas is returned to the gas holder after the compressors and the fuel gas is not supplemented, the preset strategy is as follows:
obtaining a pre-designated gas volume V which can be stored in the optimized gas holder at present and the total volume F of the gas in the gas inlet holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile And based on the pre-specified volume V of gas that can be stored in the gas holder for optimization, the total volume F of the gas in the gas holder within the first 1 hour from the current time in Total volume F of the cabinet gas within the first 1 hour from the current time out An average flow fa, an undetected low-pressure gas discharge V, over the first 1 hour from the current time, of the compressor connected to the pre-specified gas holder for optimization Low tile Acquiring a first time Ts;
obtaining current frequency n of compressor 2 And is lowered according to a preset compressorFrequency n after operating load 1 The current frequency n of the compressor 2 Rated power P of compressor motor, the first time Ts and electricity price C k Obtaining a third benefit M 3； and ,
according to rated power P of compressor motor, said first time Ts and electricity price C k Obtaining the fourth benefit M 4 ；
Comparison of third benefit M 3 And fourth benefit M 4 Obtaining a second comparison result;
if the second comparison result is that the third benefit M3 is greater than the fourth benefit M4, determining that 1 compressor reduces the operation load;
and if the second comparison result is that the third benefit M3 is smaller than the fourth benefit M4, any one of the compressors connected with the pre-designated gas holder for optimization is closed.
7. The method according to claim 3 or 6, wherein,
the first time Ts is obtained by adopting a formula (3);
the formula (3) is:
wherein the pre-specified gas volume V which is used for optimizing the gas holder and can be stored at present is obtained by a formula (3-1);
the formula (3-1) is:
V＝(H max -H)/F=H s ×V s (3-1)；
H max representing a pre-specified critical height for the optimized cabinet;
h represents a pre-designated current height of the gas holder for optimization;
hs represents a storage height of a gas holder designated in advance for optimization;
vs represents a pre-specified storage volume for the optimized gas;
wherein the total volume F of the gas in the gas inlet cabinet in the first 1 hour from the current time in Obtained from formula (3-2);
the formula (3-2) is:
m represents m strands of gas of the total gas inlet cabinet;
Fin i representing the gas volume of the ith gas inlet cabinet;
wherein ,
t1 represents the first 1 hour from the current time;
t2 represents the current time;
fin i representing the gas flow of the ith air inlet cabinet;
n represents the integral segmentation number, N is more than or equal to 2, and N is an even number;
wherein the total volume F of the gas outlet cabinet gas within the first 1 hour from the current time out Obtained from equation (3-3);
the formula (3-3) is:
k represents k gas of the total gas outlet cabinet;
Fout j representing the gas volume of the j-th gas outlet cabinet;
fout j representing the gas flow of the j-th gas outlet cabinet;
wherein the non-monitoringLow pressure gas discharge V Low tile Obtained from the formula (3-4);
the formula (3-4) is:
H 1 is the height of the gas holder at the first 1 hour.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the third benefit M 3 Calculating according to a formula (4) under the condition that the first time Ts is smaller than the distance tower cutting time;
the distance tower cutting time is as follows: t (T) 1 -t2；
The T is 1 Decoking time for the next cut tower of the coker;
the formula (4):
the fourth benefit M 4 Calculating according to a formula (5) under the condition that the first time Ts is longer than the distance tower cutting time;
the formula (5):
M 4 ＝P×T s ×C k 。
9. the method of claim 8, wherein the method further comprises:
s4, judging the undetected low-pressure gas emission V Low tile Whether the value is larger than a preset standard value or not, and acquiring a judging result;
if the judgment result is that the low-pressure gas emission V is not monitored Low tile If the emission quantity of the low-pressure gas is larger than the preset standard value, determining that the emission quantity of the low-pressure gas which is not monitored is in an abnormal state;
if saidThe judgment result is that the low-pressure gas emission V which is not monitored Low tile And if the emission quantity of the low-pressure gas is smaller than the preset standard value, determining that the emission quantity of the non-monitored low-pressure gas is in a normal state.
10. A coker decoking cycle-based gas holder compressor operating system, the system comprising:
at least one processor; and
at least one memory communicatively connected to the processor, wherein the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the coker decoking cycle-based gas holder compressor operating method of any one of claims 1 to 9.
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| US20180283368A1 (en) * | 2017-03-28 | 2018-10-04 | Uop Llc | Determining quality of gas for rotating equipment in a petrochemical plant or refinery |
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| JPS5936539A (en) * | 1982-08-26 | 1984-02-28 | Sumitomo Metal Ind Ltd | Storage method of gaseous by-product |
| US5108263A (en) * | 1989-11-08 | 1992-04-28 | Man Gutehoffnungshutte Ag | Method of optimizing the operation of two or more compressors in parallel or in series |
| CN107977736A (en) * | 2017-11-15 | 2018-05-01 | 浙江中控软件技术有限公司 | The optimization method and system of fuel gas system based on calorific value balance |
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Address after: 310053 floor 4, Zone D, central control science and Technology Park, 309 Liuhe Road, Binjiang District, Hangzhou, Zhejiang (high tech Zone) Patentee after: ZHEJIANG SUPCON SOFTWARE Co.,Ltd. Patentee after: Zhongkong Technology Co.,Ltd. Address before: 310053 floor 4, Zone D, central control science and Technology Park, 309 Liuhe Road, Binjiang District, Hangzhou, Zhejiang (high tech Zone) Patentee before: ZHEJIANG SUPCON SOFTWARE Co.,Ltd. Patentee before: ZHEJIANG SUPCON TECHNOLOGY Co.,Ltd. |