CN109099312B - Cold drum or crude benzene section waste gas treatment device and intelligent pressure maintaining and oxygen controlling method - Google Patents
Cold drum or crude benzene section waste gas treatment device and intelligent pressure maintaining and oxygen controlling method Download PDFInfo
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- CN109099312B CN109099312B CN201811046977.1A CN201811046977A CN109099312B CN 109099312 B CN109099312 B CN 109099312B CN 201811046977 A CN201811046977 A CN 201811046977A CN 109099312 B CN109099312 B CN 109099312B
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- material storage
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 69
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000001301 oxygen Substances 0.000 title claims abstract description 57
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 57
- 239000002912 waste gas Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 62
- 230000001502 supplementing effect Effects 0.000 claims abstract description 4
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000006855 networking Effects 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention provides a cold drum or crude benzene working section waste gas treatment device and a pressure-keeping and oxygen-controlling method, which comprises a controller, a gas compressor, a material storage tank, a collecting and pressure-storing tank, a treatment tank, a pressure sensor and an oxygen concentration detector, wherein the collecting and pressure-storing tank is communicated with the material storage tank through a pipeline I, the pipeline I is provided with the gas compressor and connected with the controller, the collecting and pressure-storing tank is used for collecting waste gas generated by the material storage tank through the pipeline I and storing for standby, the collecting and pressure-storing tank is communicated with the material storage tank through a pipeline II and is used for exhausting or supplementing pressure and returning gas to the material storage tank, the treatment tank is communicated with the material storage tank through a pipeline III, the pipelines I, II and III are respectively provided with a valve and connected with the controller, the material storage tank and the collecting and pressure-storing tank are provided with the pressure sensor and connected with the controller, and the controller intelligently controls the valve and the opening and closing of the gas compressor according to data acquired in real time, so that intelligent pressure keeping and oxygen control can be realized.
Description
Technical Field
The invention relates to an exhaust gas treatment technology, in particular to an exhaust gas treatment device for a cold drum or crude benzene working section and an intelligent pressure maintaining and oxygen controlling method.
Background
Cold drum of chemical industry class enterprise and crude benzene workshop section can collect waste gas from material jar and other collection points and carry out centralized processing, and material jar itself is sealed, and when the material in the material jar goes out of stock, jar body upper chamber can produce negative pressure, and jar body is easy impaired, and after the upper chamber waste gas was collected simultaneously, material jar also can be out of pressure and produce the problem, and there are two kinds of solution to keep storage tank pressure balance (following abbreviation pressurize) at present:
1. nitrogen filling and pressure maintaining method: there is a disadvantage in that the nitrogen content of the gas in the associated other systems is increased, affecting the heating value of the gas.
2. And (3) a steam filling pressure maintaining method: the disadvantage is that after entering the steam, the steam is easy to condense to produce waste water. The water content in tar and benzene is increased, the product quality is affected, and the treatment burden of wastewater is increased.
Meanwhile, after the waste gas is collected, the oxygen concentration value of the waste gas (hereinafter referred to as oxygen control) needs to be controlled, so that the problem of combustion explosion caused by the too high oxygen concentration is solved, at the present stage, when the oxygen concentration exceeds the standard, the pipeline valve introduced into other systems is closed to prevent excessive oxygen from entering other systems, so that potential safety hazards are avoided, the defect that the waste gas cannot be subjected to the next treatment after the pipeline valve is closed, the waste gas with the oxygen exceeding the standard is generally discharged into the atmosphere directly to cause air pollution, and the other means is to flush inert gas, such as nitrogen filling to control the oxygen content generally, and the difficulty of the subsequent waste gas treatment process is increased due to the addition of a large amount of nitrogen.
Disclosure of Invention
The invention aims to provide a cold drum or crude benzene working section waste gas treatment device and an intelligent pressure maintaining and oxygen controlling method, wherein a storage device for collecting waste gas reaching the standard is arranged for collecting a storage tank for reversely supplementing a material storage tank and a treatment tank, and through collecting waste gas parameters of each tank in real time, the valve between the tanks is intelligently controlled to be opened and closed, the internal pressure balance of the storage tank is intelligently maintained, and the oxygen concentration value of the waste gas of the treatment tank is controlled, so that the purpose of safely and reliably treating the waste gas is achieved.
In order to achieve the aim of the invention, the technical means adopted by the invention are as follows:
The utility model provides a cold drum or crude benzene workshop section exhaust treatment device, it includes the controller, the gas compressor, the material storage tank, collect the pressure storage tank, the treatment jar, pressure sensor, the oxygen concentration detector, the material storage tank produces volatile waste gas, concentrate in the cavity of material storage tank top, collect the pressure storage tank and pass through pipeline I and communicate with the material storage tank, pipeline I is provided with the gas compressor and is connected with the controller, collect the pressure storage tank and pass through pipeline I and collect the waste gas that the material storage tank produced and store reserve, collect the pressure storage tank and pass through pipeline II and communicate with the material storage tank, be used for pumping or make-up pressure return gas for the material storage tank, the treatment jar passes through pipeline III and communicates with the material storage tank, collect waste gas and handle, pipeline I, II, III all be provided with the valve and be connected with the controller, the material storage tank, it is connected with the controller to collect pressure sensor, oxygen concentration detector data respectively, the valve, opening and closing of gas compressor are gathered to the controller.
The treatment tank is connected with other waste gas collecting points at the same time, and is communicated with the collecting pressure storage tank through a pipeline IV, and the pipeline IV is provided with a valve and is connected with the controller.
The pressure sensor adopts a conventional corrosion-resistant pressure sensor, the oxygen concentration detector adopts a laser gas analyzer, and particularly adopts an LGA-4500 laser oxygen meter of Hangzhou light focusing technology Co., ltd. Or other similar products, the controller adopts a conventional programmable controller, the controller is at least provided with an acquisition module and an output control module, the acquisition module is connected with the pressure sensor and the oxygen concentration detector, the output control module outputs to control the opening and closing of a valve, and the controller can adopt a Siemens S7-200 programmable controller or similar products; the gas compressor adopts an anti-corrosion gas compressor, and is selected from a V-3.33/5 benzene vapor compressor or similar products of Gong Sanjiang Kaschini compressor Co.
The pressure collecting and storing tanks are 1-3, one is a working tank body, the other is a standby tank, the standby tank and the working tank are arranged between the pipeline II and the pipeline IV in parallel, and when the gas storage pressure of the working tank is insufficient, the standby tank is switched through valve control, so that one pressure collecting and storing tank is always communicated between the pipeline II and the pipeline IV.
The controller is also connected with a display screen, an industrial control host and a control console, is used for displaying and storing control data, and can realize remote monitoring through the industrial control host with a networking function.
The material storage tank is generally a tar storage tank for a cold drum working section or a crude benzene working section, and tar volatile gas or benzene vapor can be generated; collecting the gas in the pressure storage tank to form the same gas composition as the gas in the material storage tank; the process tank may also have a collection point for the exhaust gas from the material storage tank, thereby creating an oxygen-containing gas.
The method for keeping pressure and controlling oxygen by using the cold drum or crude benzene section waste gas treatment device comprises the steps of keeping pressure and controlling oxygen:
And (3) pressure maintaining:
the pressure value in the material storage tank is monitored through the controller, the valve for intelligently adjusting the inlet and outlet pipelines of the material storage tank by utilizing the gas of the collection pressure storage tank according to the pressure value is used for exhausting or supplementing the gas, and the internal pressure is adjusted:
When the detected pressure value is higher than a set value, the controller controls the corresponding electric valve to be opened or closed, and the redundant waste gas in the material storage tank is discharged to an output pipeline or collected to a collecting pressure storage tank until the pressure in the material storage tank is recovered to the set value;
When the detected pressure value is lower than the set value, the controller controls the corresponding intelligent control electric valve to be opened or closed, and exhaust gas in the collecting and pressure storing tank is discharged to the material storing tank until the pressure in the material storing tank is recovered to the set value.
Oxygen control process:
the numerical value of an intelligent oxygen concentration detector arranged on the treatment tank is monitored through the controller, and the oxygen concentration inside the collection tank is intelligently adjusted according to the numerical value of the numerical value:
When the concentration value is detected to be higher than a set value, the controller controls the corresponding intelligent control electric valve to be opened or closed, waste gas in the collecting and pressure storing tank is filled into the treatment tank to dilute the oxygen concentration, and after the concentration value reaches the set value, the treatment tank is discharged to an output pipeline to other systems for subsequent treatment; when the concentration value is detected not to be higher than the set value, the waste gas in the collecting tank is directly discharged to other systems for subsequent treatment.
Further, the collecting and pressure-storing tank is simultaneously used for pressure maintaining control of the material storage tank and oxygen control of the treatment tank, and the waste gas component in the collecting and pressure-storing tank is the same as that of the material storage tank, is not doped with other impurity gases, and is beneficial to the quality of the whole treatment process.
Further, in the oxygen control process, the collection pressure storage tank can be adopted to return air to the material storage tank through the pipeline II, the material storage tank is used for diluting the oxygen concentration in the treatment tank in a mode of increasing the input waste gas quantity to the treatment tank through the pipeline III, and the collection pressure storage tank is replaced to directly convey gas to the treatment tank for oxygen control, so that the oxygen control purpose of the treatment tank is realized.
The beneficial effects of the invention are as follows:
The device and the method are characterized in that the collected waste gas is utilized to intelligently maintain the internal pressure balance of the material storage tank and control the oxygen concentration value of the waste gas discharge point, and other mediums are not added in the waste gas treatment process. Because no new other waste gas impurities appear, the cost of waste gas treatment equipment and the difficulty of treatment process are reduced, the pollution control burden of enterprises is reduced, and the waste gas treatment quality is facilitated; through controller intelligent control, saved the cost of labor, avoided the potential safety hazard of producing because of the human factor leads to, help establishing green science and technology environmental protection type chemical industry enterprise.
Drawings
FIG. 1 is a schematic diagram showing the structural components of an embodiment of the present invention.
Detailed Description
The utility model provides a cold drum or crude benzene workshop section exhaust treatment device as shown in the attached drawing, it includes controller 5, the gas compressor 2, material storage tank 1, collect the pressure storage tank 3, handling tank 4, pressure sensor, oxygen concentration detector, material storage tank 1 produces volatile waste gas, concentrate in the cavity of material storage tank 1 top, collect the pressure storage tank 3 and communicate with material storage tank 1 through pipeline I, pipeline I is provided with gas compressor 2 and is connected with controller 5, collect the pressure storage tank 3 and collect the waste gas that material storage tank 1 produced through pipeline I and store reserve, collect the pressure storage tank 3 and communicate with material storage tank 1 through pipeline II, be used for taking out the pressure or make-up the pressure return gas for material storage tank 1, handling tank 4 communicates with material storage tank 1 through pipeline III, collect waste gas handles, pipeline I, II, III all are provided with the valve and be connected with controller 5, material storage tank 1, collect the pressure storage tank 3 is provided with pressure sensor and is connected with controller 5 respectively, oxygen concentration detector is connected with handling tank 4 and controller 5, data transmission that gathers the pressure sensor, handling tank 4 oxygen concentration detector give controller 5, the valve, the intelligent control 2 is opened and the compressor is closed. .
The treatment tank 4 is connected with other collecting points (pipelines for generating waste gas) at the same time, the treatment tank 4 is communicated with the collecting pressure storage tank 3 through a pipeline IV, and the pipeline IV is provided with a valve and is connected with the controller 5.
The pressure sensor adopts a conventional corrosion-resistant pressure sensor, the oxygen concentration detector adopts a laser gas analyzer, and particularly adopts an LGA-4500 laser oxygen meter of Hangzhou light focusing technology Co., ltd. Or other similar products, the controller 5 adopts a conventional programmable controller, the controller is at least provided with an acquisition module and an output control module, the acquisition module is connected with the pressure sensor and the oxygen concentration detector, the output control module is provided with a plurality of groups of relays which are connected with valves and gas compressors, and a Siemens S7-200 programmable controller or similar products can be selected; the gas compressor 2 adopts an anti-corrosion gas compressor, and is selected from a V-3.33/5 benzene vapor compressor or similar products of Gong Sanjiang Kaschini compressor Co.
The number of the collecting and pressure-storing tanks 3 is 1-3, one of the collecting and pressure-storing tanks is a working tank body, the other is a standby tank, the standby tank and the working tank are arranged between the pipeline II and the pipeline IV in parallel, and when the gas storage pressure of the working tank is insufficient, the switching standby tank body is controlled through the valve, so that one collecting and pressure-storing tank is always communicated between the pipeline II and the pipeline IV.
The controller 5 is also connected with a display screen, an industrial control host and a control console, and is used for displaying and storing control data, and remote monitoring can be realized through the industrial control host with a networking function.
The material storage tank 1 is generally a tar storage tank for a cold drum working section or a crude benzene working section, and tar volatile gas or benzene vapor can be generated; the gas composition in the collecting and pressure storing tank 3 is the same as the gas composition in the material storage tank; the process tank 4 may also have a collection point for the exhaust gas from the material storage tank, thereby generating oxygen-containing gas incorporation.
The method for keeping pressure and controlling oxygen by using the cold drum or crude benzene section waste gas treatment device comprises the steps of keeping pressure and controlling oxygen:
And (3) an intelligent pressure maintaining process: when the materials of the material storage tank 1 are discharged, the pressure in the tank body is reduced to form negative pressure because the material storage tank 1 is sealed, at the moment, an intelligent sensing sensor arranged on the tank body can inform a controller 5 of negative pressure information, the controller 5 can immediately inform a 3-2 valve to open so as to fill the gas of the corresponding collecting and pressure storing tank 3 into the material storage tank 1, and the pressure of the gas reaches balance; when the materials of the material storage tank 1 are put in storage, the pressure in the tank is increased, at the moment, the pressure sensor arranged on the material storage tank 1 can inform the controller 5 of the pressure increase information, the intelligent control system judges, or the gas compressor 2 is started to compress the collecting and storing tank 3 into the tank or send instructions to the 1-2 valve and the 4-2 valve to discharge the gas into the processing tank 4, so that the intelligent pressure maintaining effect of the material storage tank 1 is realized.
Intelligent oxygen control process: when the laser gas analyzer monitors that the oxygen content of the treatment tank 4 exceeds a set value, the intelligent sensing sensor arranged on the tank body can inform the controller 5 of information, the controller 5 can immediately inform the instructions of 1-2, 3-3, 4-2 and 4-3 to be closed, the valve 3-3 is opened, the gas collected from the pressure storage tank 3 is filled into the treatment tank 4 to dilute the gas in the tank, when the laser gas analyzer monitors that the oxygen content of the treatment tank 4 reaches the set value, the valve 3-3 is closed, the corresponding other valves are opened, and standard waste gas is output to a negative pressure pipeline for subsequent treatment, so that the intelligent oxygen control effect of the treatment tank is realized.
In general, the diluting treatment of the oxygen-containing waste gas in the treatment tank 4 can be completed by collecting the pressure storage tank 3, and when the oxygen-containing waste gas is excessive, the inert gas pipeline connection can be added to the treatment tank to perform the emergency treatment when the mode fails to achieve the purpose.
The above description is only of the preferred embodiments of the present invention, and the apparatus and method are also applicable to other production processes that create the same problems in the chemical field, such as the collection of exhaust gases in desulfurization processes, and it should be noted that it is possible for those skilled in the art to make several modifications without departing from the principles of the present invention, and these modifications should also be regarded as the scope of the invention without inventive effort.
Claims (5)
1. The cold drum or crude benzene working section waste gas treatment device is characterized by comprising a controller, a gas compressor, a material storage tank, a collecting and pressure-storing tank, a treatment tank, a pressure sensor and an oxygen concentration detector, wherein the material storage tank generates volatile waste gas and is concentrated in a cavity above the material storage tank;
A method for keeping pressure and controlling oxygen by using a cold drum or crude benzene section waste gas treatment device comprises the steps of keeping pressure and controlling oxygen:
And (3) pressure maintaining: the pressure value in the material storage tank is monitored through the controller, the valve for intelligently adjusting the inlet and outlet pipelines of the material storage tank by utilizing the gas of the collection pressure storage tank according to the pressure value is used for exhausting or supplementing the gas, and the internal pressure is adjusted:
When the detected pressure value is higher than a set value, the controller controls the corresponding electric valve to be opened or closed, and the redundant waste gas in the material storage tank is discharged to an output pipeline or collected to a collecting pressure storage tank until the pressure in the material storage tank is recovered to the set value;
When the detected pressure value is lower than a set value, the controller controls the corresponding intelligent control electric valve to be opened or closed, and discharges the waste gas in the collecting and storing tank to the material storage tank until the pressure in the material storage tank is recovered to the set value;
Oxygen control process:
the numerical value of an intelligent oxygen concentration detector arranged on the treatment tank is monitored through the controller, and the oxygen concentration inside the collection tank is intelligently adjusted according to the numerical value of the numerical value:
When the concentration value is detected to be higher than a set value, the controller controls the corresponding intelligent control electric valve to be opened or closed, waste gas in the collecting and pressure storing tank is filled into the treatment tank to dilute the oxygen concentration, and after the concentration value reaches the set value, the treatment tank is discharged to an output pipeline to other systems for subsequent treatment; when the concentration value is detected to be not higher than the set value, the waste gas in the collecting tank is directly discharged to other systems for subsequent treatment;
the collecting and pressure-storing tank is used for simultaneously controlling the pressure maintaining of the material storage tank and the oxygen content of the treatment tank, and the waste gas in the collecting and pressure-storing tank is the same as the material storage tank and is not doped with other impurity gases.
2. A cold drum or crude benzene section exhaust gas treatment device as claimed in claim 1, wherein the treatment tank is simultaneously connected to another exhaust gas collection point, the treatment tank is connected to the collection pressure storage tank via a pipeline iv, and the pipeline iv is provided with a valve and is connected to the controller.
3. The cold drum or crude benzene section exhaust gas treatment device according to claim 1, wherein the pressure sensor is a conventional corrosion-resistant pressure sensor, and the oxygen concentration detector is a laser gas analyzer; the controller is a conventional programmable controller, and is at least provided with an acquisition module and an output control module, wherein the acquisition module is connected with the pressure sensor and the oxygen concentration detector, and the output control module outputs to control the opening and closing of the valve; the gas compressor adopts an anti-corrosion gas compressor.
4. A cold drum or crude benzene section exhaust gas treatment device as claimed in claim 1, wherein 1 to 3 collecting and storing tanks are provided, one of which is a working tank body, the other is a standby tank, the standby tank is connected with the working tank in parallel, and when the gas storage pressure of the working tank is insufficient, the standby tank is switched through valve control.
5. The cold drum or crude benzene section exhaust gas treatment device according to claim 1, wherein the controller is further connected with a display screen, an industrial control host and a control console, and the industrial control host is used for displaying and storing control data, and can realize remote monitoring through the industrial control host with a networking function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046977.1A CN109099312B (en) | 2018-09-08 | 2018-09-08 | Cold drum or crude benzene section waste gas treatment device and intelligent pressure maintaining and oxygen controlling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811046977.1A CN109099312B (en) | 2018-09-08 | 2018-09-08 | Cold drum or crude benzene section waste gas treatment device and intelligent pressure maintaining and oxygen controlling method |
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| CN109099312B true CN109099312B (en) | 2024-04-19 |
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| CN109681775A (en) * | 2019-01-28 | 2019-04-26 | 南京科技职业学院 | A kind of system and its technique controlling waste gas spreading |
| CN114313663B (en) * | 2022-01-10 | 2023-02-24 | 福州江阴建滔化工码头有限公司 | Coarse MDI storage tank and storage method |
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| CN109099312A (en) | 2018-12-28 |
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