CN117947232A - Environment-friendly intelligent blast furnace injection system and pressure supplementing and pressure releasing control method - Google Patents
Environment-friendly intelligent blast furnace injection system and pressure supplementing and pressure releasing control method Download PDFInfo
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- CN117947232A CN117947232A CN202410353526.1A CN202410353526A CN117947232A CN 117947232 A CN117947232 A CN 117947232A CN 202410353526 A CN202410353526 A CN 202410353526A CN 117947232 A CN117947232 A CN 117947232A
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- 238000002347 injection Methods 0.000 title claims abstract description 83
- 239000007924 injection Substances 0.000 title claims abstract description 83
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 claims abstract description 41
- 230000001105 regulatory effect Effects 0.000 claims abstract description 40
- 238000007664 blowing Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000000153 supplemental effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052742 iron Inorganic materials 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
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses an environment-friendly intelligent blast furnace injection system and a pressure supplementing and pressure releasing control method, which comprise the following steps: the pulverized coal tank, with the first jetting jar and the second jetting jar that the pulverized coal tank links to each other, pressure compensating subassembly, pressure release subassembly, intelligent ceramic V type coal flow governing valve, air compensator, pressure detection unit, automatic regulation and control unit, pressure compensating subassembly includes: two groups of pressure compensating tanks, pressure compensating pipes and pressure compensating regulating valves with the same specification; the first injection tank is connected with one of the two groups of pressure compensating tanks through the pressure compensating pipe, the second injection tank is connected with the other of the two groups of pressure compensating tanks through the pressure compensating pipe, and the pressure compensating regulating valve is arranged at the pressure compensating pipe; the pressure detection unit can timely and accurately detect the pressure value in the blowing tank, so that guarantee is provided for the stability of blowing operation, and accurate data support is provided for the magnitude of pressure supplementing and pressure releasing, so that the pressure fluctuation in the blowing tank is accurately controlled.
Description
Technical Field
The invention relates to an environment-friendly intelligent blast furnace injection system, in particular to an environment-friendly intelligent blast furnace injection system and a pressure supplementing and pressure releasing control method.
Background
Blast furnace injection is an iron making process technology in which gas, liquid or solid fuel is injected into a blast furnace from a tuyere through a special device to replace part of coke in the blast furnace burden. The technology can greatly reduce the coke ratio, promote the running of furnace burden, and has obvious effects of improving the yield and the quality of pig iron.
Blast furnace injection techniques have a variety of applications including injecting fuel, coal fines, and the like. The injection fuel can be natural gas, coke oven gas, heavy oil, coal dust and the like, and can replace part of coke by the injection fuel, generally can replace 20-30%, and can reach 50% in high. Coal dust is injected to replace part of coke, so that on one hand, the coking investment can be saved, the coke oven is built less, and the air pollution caused by coking is reduced; on the other hand, the situation of shortage of coking coal supply and demand can be greatly relieved.
At present, coal dust injection is generally carried out by pure manual operation or semi-automatic operation in China, the mode is difficult to achieve accurate control of coal quantity, and because the injection rate fluctuates greatly, empty injection and pressure fluctuation phenomena are generated when coal is interrupted in the tank pouring process, hot air pressure fluctuation can be caused, and stable furnace temperature and smooth running of furnace conditions are affected. It is therefore necessary to adjust the pressure in the tank to ensure stability during use.
However, in the prior art, the manual operation is performed on the pressure supplementing and releasing links by manual operation, and the method is not only lagged in means, but also can not perform timely and synchronous adjustment according to the pressure change in the tank, so that the accurate control and adjustment of the pressure in the tank can not be performed.
Therefore, an environment-friendly intelligent blast furnace injection system and a pressure supplementing and pressure releasing control method are needed to solve the problems in the prior art.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides an environment-friendly intelligent blast furnace injection system and a pressure supplementing and pressure releasing control method.
In order to achieve the above purpose, the invention adopts the following technical scheme: an environment-friendly intelligent blast furnace injection system and pressure supplementing and pressure releasing control method, comprising: the device comprises a pulverized coal tank, a first injection tank, a second injection tank, a pressure supplementing assembly, a pressure relieving assembly, an intelligent ceramic V-shaped coal flow regulating valve, an air supplementing device, a pressure detecting unit and an automatic regulating and controlling unit, wherein the first injection tank and the second injection tank are connected with the pulverized coal tank.
The pressure compensating assembly includes: two groups of pressure compensating tanks, pressure compensating pipes and pressure compensating regulating valves with the same specification; the first injection tank is connected with one of the two groups of pressure compensating tanks through the pressure compensating pipe, the second injection tank is connected with the other of the two groups of pressure compensating tanks through the pressure compensating pipe, and the pressure compensating regulating valve is arranged at the position of the pressure compensating pipe.
The pressure relief assembly includes: a pressure relief tank, a pressure relief pipe and a pressure relief regulating valve; the first blowing tank and the second blowing tank are connected with the pressure relief tank through the pressure relief pipe, and the pressure relief regulating valve is installed at the pressure relief pipe.
The pressure detection unit is used for detecting pressure values in the first blowing tank and the second blowing tank, and the automatic regulation and control unit can control the opening of the pressure supplementing regulating valve and the pressure relieving regulating valve.
In a preferred embodiment of the present invention, the gas in the two sets of pressure compensating tanks and the pressure releasing tank is one of inert gas or compressed air.
In a preferred embodiment of the invention, the intelligent ceramic V-shaped coal flow regulating valves are arranged at the first blowing tank and the second blowing tank.
An environment-friendly intelligent blast furnace injection pressure supplementing and relieving control method is applied to the environment-friendly intelligent blast furnace injection system, and comprises the following steps:
s1, setting target pressure values of the pressure compensating tank and the pressure releasing tank in the automatic regulating unit, and monitoring the pressure values in the pressure compensating tank and the pressure releasing tank in real time through the pressure detecting unit.
S2, the automatic regulation and control unit automatically compares and judges the pressure value monitored by the pressure detection unit in real time with the target pressure value.
And S3, triggering a pressure supplementing and relieving program in the automatic regulating and controlling unit when the pressure value monitored by the pressure detecting unit in real time is smaller than or larger than the target pressure value.
And S4, calculating a pressure supplementing and relieving value Q according to the difference value between the pressure value monitored in real time and the target pressure value.
S5, predicting to obtain a tank pressure value P which is generated after coal injection according to the reaction process of the two groups of injection tanks and the planned coal injection quantity.
S6, calculating a pressure value K needing pressure compensation and pressure relief according to the calculated pressure compensation and pressure relief value Q and a tank pressure value P to be generated after coal injection in a difference value calculation mode, wherein the calculation expression is as follows:；
Wherein, K is the pressure value needed to supplement and release pressure, and the unit is: MPa; q is the pressure compensation and relief value, unit: MPa; p is the pressure value in the tank to be generated after coal injection, and the unit is: and (5) MPa.
And S7, the automatic regulating and controlling unit generates a pressure fluctuation curve f (t) according to the pressure compensating and releasing values Q in the two groups of injection tanks, the tank pressure value P to be generated after coal injection and the pressure value K to be subjected to pressure compensating and releasing.
In a preferred embodiment of the present invention, the pressure detecting unit is one of a pressure sensor, a pressure gauge, a pressure transmitter, and a pressure switch.
In a preferred embodiment of the present invention, the pressure fluctuation curve includes: a pressure rising portion and a pressure falling portion; the junction of the pressure rising portion and the pressure falling portion is a target pressure value.
In a preferred embodiment of the present invention, a pressure compensation line L (t) tangential to the pressure fluctuation curve is established according to the pressure fluctuation curve;
in a preferred embodiment of the present invention, L (t) is a range of values (0, T 1],T1 is the time in min required to reach the target pressure.
In a preferred embodiment of the present invention, under the condition of the time limit T 1, the additional supplementing quantity Q 1 in the pressure supplementing and releasing process is obtained by performing integral calculation according to the pressure fluctuation curve and the pressure compensation line, and the calculation expression is as follows:。
In a preferred embodiment of the present invention, the remaining supplementary quantity Q 2 is calculated according to the supplementary pressure relief value Q and the additional supplementary quantity Q 1, and the calculation expression is: 。
In a preferred embodiment of the invention, adding additional make-up quantity Q 1 during the pressure boost and relief process accelerates the rise in pressure value in the tank, and adding additional make-up quantity Q 2 to make-up the remaining make-up quantity can adjust for changes in pressure value in the tank.
In a preferred embodiment of the present invention, the automatic control unit further includes: a pressure fault alarm and a manual and automatic one-key switching unit.
The invention solves the defects existing in the background technology, and has the following beneficial effects:
(1) The pressure detection unit can timely and accurately detect the pressure value in the blowing tank when in use, thereby providing guarantee for the stability of blowing operation and providing accurate data support for the magnitude of pressure compensation and pressure relief; the pressure compensation component and the pressure relief component can accurately control pressure fluctuation in the blowing tank under real-time online regulation and control of the automatic regulation and control unit, so that the response speed of pressure change is accelerated, the situation of overcompensation or insufficient compensation can be effectively reduced, and the environment-friendly, efficient and intelligent pressure detection control operation is realized. Thereby solved among the prior art, manual regulation jar pressure is difficult to accurate control's technical problem.
(2) According to the invention, the automatic regulation and control unit is used for realizing the accurate control of the pressure supplementing assembly and the pressure releasing assembly, so that the effect of automatic pressure supplementing and releasing can be realized in the normal working process, and the real-time alarm can be carried out when the problem occurs in individual equipment, thereby avoiding the accident caused by the problem of injection pressure.
(3) According to the invention, the manual and automatic one-key switching unit is arranged, so that the manual and automatic free switching can be realized, the stability of pressure in the running process can be ensured for a long time, and the pressure fault can be treated in time.
(4) According to the invention, the residual supplementing quantity Q 2 is calculated through the supplementing pressure relief value Q and the additional supplementing quantity Q 1, so that further accurate supplementing of pressure regulation can be realized, the use process is ensured to be more stable, the blowing uniformity is further ensured, and the environmental protection effect is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
FIG. 1 is a schematic view of the structure of the environment-friendly intelligent blast furnace injection system of the present invention;
Fig. 2 is a schematic flow chart of the pressure compensating and relieving step of the present invention.
In the figure: 1. a pulverized coal tank; 2. a first blowing tank; 3. a second blowing tank; 4. a pressure supplementing tank; 5. a pressure compensating pipe; 6. a pressure compensating regulating valve; 7. a pressure relief tank; 8. a pressure relief tube; 9. a pressure relief regulating valve; 10. an intelligent ceramic V-shaped coal flow regulating valve; 11. an air-supplementing device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only 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.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may include one or more of the feature, either explicitly or implicitly. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1, an environment-friendly intelligent blast furnace injection system comprises: the device comprises a pulverized coal tank 1, a first injection tank 2 and a second injection tank 3 which are connected with the pulverized coal tank 1, a pressure supplementing component, a pressure relief component, an intelligent ceramic V-shaped coal flow regulating valve 10, an air supplementing device 11, a pressure detecting unit and an automatic regulating and controlling unit.
The pressure compensating assembly includes: two groups of pressure compensating tanks 4, pressure compensating pipes 5 and pressure compensating regulating valves 6 with the same specification; the first blowing tank 2 is connected with one of the two groups of pressure compensating tanks 4 through the pressure compensating pipe 5, the second blowing tank 3 is connected with the other of the two groups of pressure compensating tanks 4 through the pressure compensating pipe 5, and the pressure compensating regulating valve 6 is arranged at the position of the pressure compensating pipe 5.
The pressure relief assembly includes: a pressure relief tank 7, a pressure relief pipe 8 and a pressure relief regulating valve 9; the first blowing tank 2 and the second blowing tank 3 are connected with the pressure relief tank 7 through the pressure relief pipe 8, and the pressure relief regulating valve 9 is installed at the pressure relief pipe 8.
The pressure detection unit is used for detecting pressure values in the first blowing tank 2 and the second blowing tank 3, and the automatic regulation and control unit can control the opening of the pressure compensation regulating valve 6 and the pressure relief regulating valve 7.
In one embodiment, the gas in the two sets of pressure compensating tanks 4 and pressure releasing tanks 7 is one of inert gas or compressed air. The intelligent ceramic V-shaped coal flow regulating valves 10 are arranged at the first injection tank 2 and the second injection tank 3.
As shown in fig. 2, the method for controlling injection pressure compensation and pressure release of the environment-friendly intelligent blast furnace is applied to the environment-friendly intelligent blast furnace injection system, and comprises the following steps:
s1, setting target pressure values of the pressure compensating tank and the pressure releasing tank in the automatic regulating unit, and monitoring the pressure values in the pressure compensating tank and the pressure releasing tank in real time through the pressure detecting unit.
S2, the automatic regulation and control unit automatically compares and judges the pressure value monitored by the pressure detection unit in real time with the target pressure value.
And S3, triggering a pressure supplementing and relieving program in the automatic regulating and controlling unit when the pressure value monitored by the pressure detecting unit in real time is smaller than or larger than the target pressure value.
And S4, calculating a pressure supplementing and relieving value Q according to the difference value between the pressure value monitored in real time and the target pressure value.
S5, predicting to obtain a tank pressure value P which is generated after coal injection according to the reaction process and the planned coal injection amount in the two groups of injection tanks.
S6, calculating a pressure value K needing pressure compensation and pressure relief according to the calculated pressure compensation and pressure relief value Q and a tank pressure value P to be generated after coal injection in a difference value calculation mode, wherein the calculation expression is as follows:；
Wherein, K is the pressure value needed to supplement and release pressure, and the unit is: MPa; q is the pressure compensation and relief value, unit: MPa; p is the pressure value in the tank to be generated after coal injection, and the unit is: and (5) MPa.
And S7, modeling and generating a pressure fluctuation curve f (t) by the automatic regulation and control unit according to the pressure supplementing and releasing values Q in the two groups of injection tanks, the tank pressure value P to be generated after coal injection and the pressure value K to be subjected to pressure supplementing and releasing.
In one embodiment, the pressure detection unit is one of a pressure sensor, a pressure gauge, a pressure transmitter, and a pressure switch. The pressure fluctuation curve includes: a pressure rising portion and a pressure falling portion; the junction of the pressure rising portion and the pressure falling portion is a target pressure value.
In one embodiment, a pressure compensation line L (t) tangential to the pressure fluctuation curve is established according to the pressure fluctuation curve; the range of L (t) (0, T 1],T1 is the time required to reach the target pressure value in min).
Under the condition of a time limit T 1, carrying out integral calculation according to a pressure fluctuation curve and a pressure compensation line to obtain an additional supplementing quantity Q 1 in the pressure supplementing and releasing process, wherein the calculation expression is as follows:。
According to the pressure compensating relief value Q and the additional supplementing quantity Q 1, the residual supplementing quantity Q 2 is calculated, and the calculation expression is as follows: 。
Adding additional supplemental quantity Q 1 during pressurization and depressurization can accelerate the rise of the pressure value in the tank, and adding supplemental residual supplemental quantity Q 2 can adjust the change of the pressure value in the tank.
Example 1
The gas in the pressure supplementing tank and the pressure releasing tank is inert gas, preferably nitrogen. The pressure detection unit is preferably a pressure transmitter.
Assuming that a target pressure value of the blowing tank is set to 300MPa in the automatic regulation unit, the real-time monitoring of the pressure value in the blowing tank by the pressure detection unit is started from 100 MPa; thus, the pressure compensation and relief value Q is calculated to be 200MPa.
And according to the basic physical parameters of the injection tank, the density and the flow velocity of coal injection, the flow characteristic of coal powder in the injection tank, the safety pressure test value of the injection tank and other parameters, calculating the pressure value P in the tank which is generated after coal injection, selecting relevant equipment in the intelligent uniform injection system in the prior art FH, and calculating the pressure value in the tank which is generated after coal injection to be 20MPa.
By calculating expressionsAnd calculating a pressure value K which needs to be subjected to pressure compensation and pressure relief, namely 180MPa.
And generating a pressure fluctuation curve f (t) according to the pressure supplementing and relieving values Q in the two groups of injection tanks, the tank pressure value P to be generated after coal injection and the pressure value K to be subjected to pressure supplementing and relieving.
Generating a pressure compensation line L (t) according to the pressure fluctuation curve f (t); by using computational expressionsThe shadow area formed between the pressure fluctuation curve f (t) and the pressure compensation line L (t) is calculated, thereby calculating the additional replenishment quantity Q 1.
The remaining replenishment quantity Q 2 is calculated from the replenishment pressure relief value Q and the additional replenishment quantity Q 1 and from the calculation expression.
The relevant data calculated by the above method are as follows:
In summary, according to the technical scheme provided by the application, the pressure value in the injection tank can be continuously and stably ensured in the injection pressure supplementing and pressure releasing process of the blast furnace, so that the pressure fluctuation in the injection tank can be more accurately controlled, and the occurrence of the condition of overcompensation or insufficient compensation is avoided.
When the invention is used, the pressure value in the blowing tank can be detected in real time through the pressure detection unit, so that an accurate pressure value is obtained; when the pressure value fluctuates, the automatic regulation and control unit can trigger the pressure supplementing assembly and the pressure releasing assembly at the first time, so that the pressure supplementing tank or the pressure releasing tank works; and in the pressure supplementing and pressure releasing working process, the pressure supplementing and pressure releasing value Q and the additional supplementing quantity Q 1 are obtained through calculation, so that the rise of the pressure value in the tank can be quickened, the change of the pressure value in the tank can be regulated, the pressure supplementing and pressure releasing automation is realized, and the environment protection and high efficiency in the use process are ensured.
The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art 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 (9)
1. An environmental protection intelligent blast furnace injection system, comprising: the device comprises a coal powder tank, a first injection tank, a second injection tank, a pressure supplementing assembly, a pressure relieving assembly, an intelligent ceramic V-shaped coal flow regulating valve, an air supplementing device, a pressure detecting unit and an automatic regulating and controlling unit, wherein the first injection tank and the second injection tank are connected with the coal powder tank; the method is characterized in that:
The pressure compensating assembly includes: two groups of pressure compensating tanks, pressure compensating pipes and pressure compensating regulating valves with the same specification; the first injection tank is connected with one of the two groups of pressure compensating tanks through the pressure compensating pipe, the second injection tank is connected with the other of the two groups of pressure compensating tanks through the pressure compensating pipe, and the pressure compensating regulating valve is arranged at the pressure compensating pipe;
the pressure relief assembly includes: a pressure relief tank, a pressure relief pipe and a pressure relief regulating valve; the first blowing tank and the second blowing tank are connected with the pressure relief tank through the pressure relief pipe, and the pressure relief regulating valve is arranged at the pressure relief pipe;
the pressure detection unit is used for detecting pressure values in the first blowing tank and the second blowing tank, and the automatic regulation and control unit can control the opening of the pressure supplementing regulating valve and the pressure relieving regulating valve.
2. The environment-friendly intelligent blast furnace injection system as claimed in claim 1, wherein: the two groups of pressure supplementing tanks and the pressure relief tank are one of inert gas or compressed air.
3. The environment-friendly intelligent blast furnace injection system as claimed in claim 1, wherein: the intelligent ceramic V-shaped coal flow regulating valves are arranged at the first blowing tank and the second blowing tank.
4. An environmental protection intelligent blast furnace injection pressure supplementing and relieving control method applied to the environmental protection intelligent blast furnace injection system of any one of claims 1-3, characterized by comprising the following steps:
s1, setting a target pressure value of the blowing tank in an automatic regulation unit, and monitoring the pressure value in the blowing tank in real time through a pressure detection unit;
S2, the automatic regulation and control unit automatically compares and judges the pressure value monitored by the pressure detection unit in real time with a target pressure value;
s3, triggering a pressure supplementing and relieving program in the automatic regulating and controlling unit when the pressure value monitored by the pressure detecting unit in real time is smaller than or larger than the target pressure value;
s4, calculating a pressure supplementing and relieving value Q according to the difference value between the pressure value monitored in real time and the target pressure value;
s5, predicting to obtain a tank pressure value P to be generated after coal injection according to the reaction process of the two groups of injection tanks and the planned coal injection quantity;
S6, calculating a pressure value K needing pressure compensation and pressure relief according to the calculated pressure compensation and pressure relief value Q and a tank pressure value P to be generated after coal injection in a difference value calculation mode, wherein the calculation expression is as follows: ；
wherein, K is the pressure value needed to supplement and release pressure, and the unit is: MPa; q is the pressure compensation and relief value, unit: MPa; p is the pressure value in the tank to be generated after coal injection, and the unit is: MPa;
And S7, the automatic regulating and controlling unit generates a pressure fluctuation curve f (t) according to the pressure compensating and releasing values Q in the two groups of injection tanks, the tank pressure value P to be generated after coal injection and the pressure value K to be subjected to pressure compensating and releasing.
5. The method for controlling injection pressure compensation and pressure release of an environment-friendly intelligent blast furnace according to claim 4, which is characterized in that: the pressure detection unit is one of a pressure sensor, a pressure gauge, a pressure transmitter and a pressure switch.
6. The method for controlling injection pressure compensation and pressure release of an environment-friendly intelligent blast furnace according to claim 4, which is characterized in that: the pressure fluctuation curve includes: a pressure rising portion and a pressure falling portion; the junction of the pressure rising portion and the pressure falling portion is a target pressure value.
7. The method for controlling injection pressure compensation and pressure release of an environment-friendly intelligent blast furnace according to claim 4, which is characterized in that: a pressure compensation line L (t) tangential to the pressure fluctuation curve is established from the pressure fluctuation curve.
8. The method for controlling injection pressure compensation and pressure release of an environment-friendly intelligent blast furnace according to claim 7, which is characterized in that: under the condition of a time limit T 1, carrying out integral calculation according to a pressure fluctuation curve and a pressure compensation line to obtain an additional supplementing quantity Q 1 in the pressure supplementing and releasing process, wherein the calculation expression is as follows:。
9. The method for controlling injection pressure compensation and pressure release of an environment-friendly intelligent blast furnace according to claim 8, which is characterized in that: according to the pressure compensating relief value Q and the additional supplementing quantity Q 1, the residual supplementing quantity Q 2 is calculated, and the calculation expression is as follows: 。
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2024
- 2024-03-27 CN CN202410353526.1A patent/CN117947232A/en active Pending
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| FR1357014A (en) * | 1963-02-18 | 1964-04-03 | Device for pressurizing and decompressing the airlock of a blast furnace | |
| CN101899542A (en) * | 2010-08-05 | 2010-12-01 | 中冶南方工程技术有限公司 | Coal injection system of blast furnace |
| CN101921886A (en) * | 2010-08-05 | 2010-12-22 | 中冶南方工程技术有限公司 | Method for controlling coal injecting rate of blast furnace |
| CN105177200A (en) * | 2015-09-08 | 2015-12-23 | 中冶赛迪工程技术股份有限公司 | Blast furnace coal injection system and control method thereof |
| CN210711597U (en) * | 2019-11-06 | 2020-06-09 | 大峘集团有限公司 | Automatic control device for tank pressure of pulverized coal injection tank |
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