CN117474414A - Method for evaluating pressure vessel temperature and pressure dynamic risk by using trace method - Google Patents
Method for evaluating pressure vessel temperature and pressure dynamic risk by using trace method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000000126 substance Substances 0.000 claims abstract description 30
- 238000004880 explosion Methods 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000008570 general process Effects 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims description 8
- 238000012502 risk assessment Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000003440 toxic substance Substances 0.000 claims description 3
- 231100000614 poison Toxicity 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 125000003636 chemical group Chemical group 0.000 description 2
- 238000006757 chemical reactions by type Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- G—PHYSICS
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
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- G06Q10/0635—Risk analysis of enterprise or organisation activities
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Abstract
The invention discloses a method for evaluating the temperature and pressure dynamic risk of a pressure container by using a trace method, which comprises the following steps: s1: judging a substance coefficient MF of a substance in the pressure vessel; s2: judging a general process risk coefficient F1 of substances in the pressure vessel; s3: judging a special process risk coefficient F2 of substances in the pressure container; s4: calculating a process unit risk factor F3, f3=f1×f2 from S2 and S3; s5: judging a fire explosion index FXMF after the substances in the pressure vessel explode, wherein fxmf=f3; s6: calculating the material in the pressure vessel and correcting the coefficient F4 under the pressure and the temperature; s7: the corrected fire explosion index F & EI, F & ei=fxmfxf4 is calculated. The method can utilize the corrected pressure and temperature coefficient to improve the accuracy of the calculated fire explosion index, and further judge the risk more accurately.
Description
Technical Field
The invention belongs to a risk assessment method of a pressure container, and particularly relates to a method for evaluating the temperature and pressure dynamic risk of the pressure container by using a trace method.
Background
The pressure vessel is a closed device for containing gas or liquid and bearing a certain pressure.
The risk evaluation index system is a comprehensive combination of various indexes capable of effectively reflecting characteristics of an evaluation object, and the risk condition of the pressure vessel in use can be comprehensively known by utilizing the index system. Based on the results of risk influence factor identification and analysis, risk evaluation indexes are extracted, and a risk evaluation index system for pressure-bearing special equipment is constructed, so that the method is one of methods for efficiently and accurately carrying out risk analysis on the pressure container.
The fire explosion hazard level of the current pressure container is equal to the fire explosion index of the normal working pressure container. For example, if the fire explosion index of a certain pressure vessel is 168, the fire explosion risk level corresponding to 168 is greater than the prescribed value 159 (v-level), so the fire explosion risk level of the pressure vessel is v-level. However, the calculation method does not consider the actual reaction type in the pressure vessel, and different reaction types can cause different changes of the pressure and the temperature of the pressure vessel, and have different effects on the fire explosion risk level of the pressure vessel.
Disclosure of Invention
The method for evaluating the temperature and pressure dynamic risk of the pressure container by using the sideward method can comprehensively judge the fire explosion index according to the pressure and the temperature according to the reaction currently performed by the pressure container, and obtain more accurate fire explosion risk level.
In order to achieve the above purpose, the method for evaluating the temperature and pressure dynamic risk of the pressure vessel by using the trace method of the invention comprises the following steps: s1: judging a substance coefficient MF of a substance in the pressure vessel; s2: judging a general process risk coefficient F1 of substances in the pressure vessel; s3: judging a special process risk coefficient F2 of substances in the pressure container; s4: calculating a process unit risk factor F3, f3=f1×f2 from S2 and S3; s5: judging a fire explosion index FXMF after the substances in the pressure vessel explode, wherein fxmf=f3; s6: calculating the material in the pressure vessel and correcting the coefficient F4 under the pressure and the temperature; s7: the corrected fire explosion index F & EI, F & ei=fxmfxf4 is calculated.
Further, in step S6, the following steps are included: s61: querying a standard working temperature T0 of a substance in the pressure vessel; s62: measuring the material in the pressure vessel and the working temperature T1 at the time T; s63: calculating a temperature change coefficient: 1+ (T1-T0)/T0; s64: querying a standard working pressure P0 of the substance in the pressure vessel; s65: measuring the material in the pressure vessel and the working temperature P1 at the time T; s66: calculating a pressure change coefficient: 1+ (P1-P0)/P0; s67: f4 = (1+ (T1-T0)/T0) × (1+ (P1-P0)/P0).
Further, the general risk factors include: basic coefficients, endothermic reactions, channels, and emissions and leakage control.
Further, the special process risk factors include: basic coefficients, toxic substances, negative pressure, corrosion and abrasion, leakage and turning equipment.
In step S7, determining risk using table 3;
TABLE 3 fire and explosion hazard level determination table
The beneficial effects are that:
according to the scheme, the temperature change coefficient is calculated, the pressure change coefficient is calculated, the correction coefficient F4 under the pressure and the temperature is obtained, and the corrected fire explosion index F & EI can be calculated through the F4, so that the judged fire and explosion risk level is more accurate.
Drawings
Fig. 1 is a flow chart of the present method.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
a method for evaluating the temperature and pressure dynamic risk of a pressure container by using a trace method comprises the following steps:
s1: judging a substance coefficient MF of a substance in the pressure vessel;
s2: judging a general process risk coefficient F1 of substances in the pressure vessel;
s3: judging a special process risk coefficient F2 of substances in the pressure container;
s4: calculating a process unit risk factor F3, f3=f1×f2 from S2 and S3;
s5: judging a fire explosion index FXMF after the substances in the pressure vessel explode, wherein fxmf=f3;
s6: calculating the material in the pressure vessel and correcting the coefficient F4 under the pressure and the temperature;
s7: the corrected fire explosion index F & EI, F & ei=fxmfxf4 is calculated.
Wherein, step S6 includes the following steps:
s61: querying a standard working temperature T0 of a substance in the pressure vessel;
s62: measuring the material in the pressure vessel and the working temperature T1 at the time T;
s63: calculating a temperature change coefficient: 1+ (T1-T0)/T0;
s64: querying a standard working pressure P0 of the substance in the pressure vessel;
s65: measuring the material in the pressure vessel and the working temperature P1 at the time T;
s66: calculating a pressure change coefficient: 1+ (P1-P0)/P0;
S67：F4＝(1+(T1-T0)/T0)*(1+(P1-P0)/P0)。
example 2
Urea production is carried out in urea workshops of a certain chemical group by adopting a set of ammonia stripping devices. The high temperature and high pressure in the production process can lead the synthesis of urea to have fire explosion hazard. The actual potential fire, explosion and reactivity hazards of the technological process and production devices and the contained materials are analyzed step by adopting a temperature and pressure correction normalization method for dynamic risk assessment of the pressure vessel.
The data for the pressure vessel of this chemical group are shown in table 1:
TABLE 1 summary of fire and explosion index results during urea production
As can be seen from table 1:
due to the fact that the pressure vessel is mainly CH 4， ，CH 4 The substance coefficient MF of (1) is recorded in table 2 by referring to the substance coefficient table of the substance, which is 21. That is, mf=21 in step S1.
As can be seen from Table 2, CH 4 The general process coefficients of (2) are mainly composed of basic coefficients, endothermic reactions, channels and emission and leakage control, and the corresponding risk coefficients are recorded in table 2, and the coefficients of the above parts are judged by expert scores, and the general process coefficients are the sum of the risk coefficients of the basic coefficients, endothermic reactions, channels and emission and leakage control, namely 2.1. That is, the general process risk factor f1=2.1 in step S2.
As can be seen from Table 2, CH 4 The danger coefficient of the special process of the (B) is mainly composed of basic coefficient, toxic substance and negative pressure<500 mmH), pressure, corrosion and abrasion, leakage-joint and filler and rotating equipment, and the danger coefficient of special process is the above-mentioned basic coefficient, toxic material and negative pressure<500 mmH), pressure, corrosion and abrasion, leakage-the sum of the coefficients of the joint and of the packing and of the rotating equipment, i.e. 4.06, likewise the coefficients of the above-mentioned parts are judged by an expert. That is, the special process risk factor f2=4.06 in step S3.
The process unit risk coefficient f3=f1×f2=4.06×2.1= 8.526 in S4 thus calculated; recorded in table 2.
Then in S5, CH 4 Fire explosion index=21×8.526= 179.046. Recorded in table 2.
Table 2 records temperature and pressure data of the pressure vessel at a certain time T1.
TABLE 2 temperature and pressure acquisition at a certain time
F4 in table 3, i.e. 179.046×1.2= 214.8552, the fire explosion index in S5 is known to be v from table 3.
TABLE 3 fire and explosion hazard level determination table
Table 4 records temperature and pressure data of the pressure vessel at a certain time T2.
Table 4 temperature and pressure acquisition at T2 time
F4 in table 3, i.e. 179.046×0.879= 214.8552 = 157.53, the fire explosion index in S5 is known as the explosion rating of iv according to table 3.
By combining the above steps, the risk level of the substance can be evaluated based on a given index. Based on the calculated F & EI values, the materials can be classified into different hazard levels, from the lightest to very large.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. The method for evaluating the dynamic risk of the temperature and the pressure of the pressure vessel by using the trace method is characterized by comprising the following steps of:
s1: judging a substance coefficient MF of a substance in the pressure vessel;
s2: judging a general process risk coefficient F1 of substances in the pressure vessel;
s3: judging a special process risk coefficient F2 of substances in the pressure container;
s4: calculating a process unit risk factor F3, f3=f1×f2 from S2 and S3;
s5: judging a fire explosion index FXMF after the substances in the pressure vessel explode, wherein fxmf=f3;
s6: calculating the material in the pressure vessel and correcting the coefficient F4 under the pressure and the temperature;
s7: the corrected fire explosion index F & EI, F & ei=fxmfxf4 is calculated.
2. The method for performing dynamic risk assessment of temperature and pressure of a pressure vessel by using the method as set forth in claim 1, wherein in step S6, the method comprises the steps of:
s61: querying a standard working temperature T0 of a substance in the pressure vessel;
s62: measuring the material in the pressure vessel and the working temperature T1 at the time T;
s63: calculating a temperature change coefficient: 1+ (T1-T0)/T0;
s64: querying a standard working pressure P0 of the substance in the pressure vessel;
s65: measuring the material in the pressure vessel and the working temperature P1 at the time T;
s66: calculating a pressure change coefficient: 1+ (P1-P0)/P0;
S67：F4＝(1+(T1-T0)/T0)*(1+(P1-P0)/P0)。
3. the method for dynamic risk assessment of pressure vessel temperature and pressure by applying the channelizing method according to claim 1, wherein the general risk coefficients comprise: basic coefficients, endothermic reactions, channels, and emissions and leakage control.
4. The method for evaluating the temperature and pressure dynamic risk of a pressure vessel by using the channelizing method according to claim 1, wherein the specific process risk coefficients comprise: basic coefficients, toxic substances, negative pressure, corrosion and abrasion, leakage and turning equipment.
5. The method for dynamic risk assessment of pressure vessel temperature and pressure by applying the method according to claim 1, wherein in step S7, risk is determined by using table 3;
TABLE 3 fire and explosion hazard level determination table
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| CN202311698501.7A CN117474414A (en) | 2023-12-11 | 2023-12-11 | Method for evaluating pressure vessel temperature and pressure dynamic risk by using trace method |
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