CN112058181A - Normal-pressure continuous quantitative feeding system for alkylating device active agent - Google Patents
Normal-pressure continuous quantitative feeding system for alkylating device active agent Download PDFInfo
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- CN112058181A CN112058181A CN202010939310.5A CN202010939310A CN112058181A CN 112058181 A CN112058181 A CN 112058181A CN 202010939310 A CN202010939310 A CN 202010939310A CN 112058181 A CN112058181 A CN 112058181A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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Abstract
The invention relates to a normal-pressure continuous quantitative feeding system for an activating agent of an alkylation device, belonging to the technical field of petrochemical industry. The constant-pressure continuous quantitative feeding system for the activating agent of the alkylation device solves the problems of accurate addition and metering of the activating agent, caking and easy wall hanging and pipeline blockage after hydrocarbon gas in a reaction kettle contacts with the activating agent, and fundamentally solves the problems of environmental pollution and occupational injury to operators caused by dust leakage of the activating agent during agent loading.
Description
Technical Field
The invention relates to an active agent continuous constant-pressure quantitative feeding system for an alkylation device; the system is mainly used for dust-free closed unpacking, storing, metering, efficient conveying and dedusting, continuous quantitative feeding and the like of an alkylating device active agent in a petrochemical enterprise, and belongs to the technical field of petrochemical industry.
Background
The alkylation reaction of isobutane with butenes is a catalytic reaction process that converts the carbon 4 hydrocarbon component, which is the product of the catalytic cracking reaction in the petroleum refining industry, into carbon 8 branched chain isooctane (alkylated gasoline). The alkylated gasoline has high octane number and low Reid Vapor Pressure (RVP), is composed of saturated alkanes, does not contain aromatics, olefins and sulfur, is the most ideal blending component of the reformulated gasoline, and is called clean alkyl gasoline.
In the industrialized alkyl gasoline production process, concentrated sulfuric acid and hydrofluoric acid are used as catalysts, so that the problems of large waste acid discharge amount, serious environmental pollution, corrosion of production equipment and the like exist; alternative solid phase catalysts have problems with deactivation and regeneration, and therefore, the development of new, environmentally friendly alkylation catalysts and reaction processes is an important issue.
In the national key laboratory of heavy oil of the Chinese university of Petroleum (Beijing), a series of research works from foundation to application are developed in the direction of the alkylation reaction of isoparaffin and olefin catalyzed by ionic liquid. The ionization (ioninylation) alkylation reaction process developed by the method adopts a composite catalyst system consisting of acidic chloroaluminate ionic liquid and a metal auxiliary agent, can effectively inhibit the generation of side reactions of isomerization and cracking, and improves the yield and selectivity of alkylate oil. The catalyst system stably runs on a pilot plant for 60 days, the conversion rate of butylene is more than 99%, the yield of C8 reaches 95.6%, wherein trimethylolpropane (TMP for short) accounts for 89.6%, 2, 2, 4-TMP accounts for 51.7%, the research octane number RON of the obtained alkylate is more than 100, the alkylate has higher quality than that obtained by the existing industrial sulfuric acid method and hydrofluoric acid method, and ionic liquid almost does not corrode production equipment, so that the defect that the sulfuric acid method and hydrofluoric acid method alkylation seriously harm the environment and human body is overcome, and the catalyst system is a novel alkylation process with double greenization of a process and a product.
The operation result of the ionic liquid alkylation device of China Petroleum Gurley petrochemical company built at home at present shows that the conversion rate of olefin reaches 100%, the octane number of the alkylate oil is as high as more than 97, the equivalent of catalyst of each ton of alkylate oil consumes 3 kg, the energy consumption is 125 kgEO/ton of alkylate oil, the yield of alkylate oil and research octane number RON are respectively 75% (mass fraction, the same below) and 98.8%, and the method is higher than the original sulfuric acid process (73% and 95%), thereby showing good prospect.
At present, alkylating device active agent tinning and reinforced mode mainly are with the crane with the active agent wrapping bag promote to the height more than 25 meters, then to the manual work mode of unpacking, the active agent buffer tank is added through the dead weight to the active agent, passes through the material dead weight from the buffer tank again and gets into the ball valve, ball valve export direct access reation kettle. The method mainly has the problems that the environment pollution is caused by the flying of the dust on the top of the tank, the active agent dust has strong corrosivity on a site steel structure and a platform, the flying active agent causes damage to the health of workers, hydrocarbon gas is easy to agglomerate after contacting with the active agent, the wall is hung on the wall, a feeding pipeline above the reaction kettle is easy to block, and the accurate measurement on the addition amount of the active agent can not be carried out without a measuring system.
Therefore, the constant-pressure continuous quantitative feeding system for the active agent of the alkylation device is provided, the problems of unpacking, storing, metering, conveying, dedusting, continuous quantitative feeding and the like of the active agent are fundamentally solved, and the technical problem which is urgently needed to be solved in the technical field is solved.
Disclosure of Invention
The invention aims to provide a continuous quantitative feeding system for an alkylating device active agent, which fundamentally solves the problems of unpacking, storage, metering, conveying, dust removal, continuous quantitative feeding, emergency stop and cut-off under abnormal working conditions and the like of the active agent, thereby achieving the purposes of protecting the environment, improving the operating level of the device and prolonging the service life of equipment.
The above object of the present invention is achieved by the following technical solutions:
an atmospheric continuous dosing system for an alkylation unit active agent, comprising: the device comprises a closed discharger, an active agent buffering and micro-negative pressure dust removal unit, closed dense-phase conveying equipment, an active agent storage and filtration unit, small automatic feeding metering and conveying equipment, a temporary storage and dust removal unit, a weighing metering and anti-bonding unit, a double-helix continuous quantitative feeding unit and an emergency stop cutting unit; the closed discharger is connected with the active agent buffer and micro-negative pressure dust removal unit, the active agent buffer and micro-negative pressure dust removal unit is connected with the closed dense-phase conveying equipment, the closed dense-phase conveying equipment is connected with the active agent storage and filtering unit, the active agent storage and filtering unit is connected with the small automatic feeding metering and conveying equipment, the small automatic feeding metering and conveying equipment is connected with the temporary storage and dust removal unit, the temporary storage and dust removal unit is connected with the weighing metering and anti-sticking unit, the weighing metering and anti-sticking unit is connected with the double-helix continuous quantitative feeding unit, and the double-helix continuous quantitative feeding unit is connected with the emergency stopping and cutting unit, so that a complete quantitative feeding process is completed.
Preferably, the hermetic discharger includes: the device comprises a beating plate, a cylinder, a closed unloading frame, an aperture valve, a lifting bag pressing cylinder and a small blanking hopper; the beating plates are connected with the cylinders, the four cylinders are respectively fixed on the periphery of the closed unloading frame, the diaphragm valves are installed in the center of the closed unloading frame, the lifting bag pressing cylinder is fixed below the inlet of the small blanking hopper, and the small blanking hopper is fixed with the closed unloading frame through a connecting pipe.
Preferably, the active agent buffering and micro-negative pressure dust removal unit comprises: feed valve, buffering storage feed bin, the high-efficient dust remover of buffering storehouse, return dirt mouth and buffering storage feed bin discharge gate, the lower little hopper in the upper end of feed valve and the airtight tripper is managed to the pipeline and is linked to each other, the lower extreme of feed valve is through the pipe-line mounting at the entry of buffering storage feed bin, the upper portion one side of buffering storage feed bin is equipped with the high-efficient dust remover of buffering storehouse, buffering storage feed bin discharge gate is located the lower extreme of buffering storage feed bin, returns the upper portion that the dirt mouth was located the buffering storage feed bin.
Preferably, the closed dense-phase conveying equipment comprises a feed valve, a level gauge, an exhaust valve, a conveying tank body, a discharge valve, an ejector, a purge valve, a weighing sensor, a pressurization valve and a pressure transmitter; the conveying tank body is positioned in the middle of the closed dense-phase conveying equipment, the feeding valve is positioned in the center of the upper part of the conveying tank body and is connected with a discharge port of the buffer storage bin, the level indicator, the pressurizing valve and the pressure transmitter are positioned at the end socket part of the conveying tank body, the exhaust valve is arranged at the end socket part of the conveying tank body, the discharge valve is arranged at the lower part of the conveying tank body and is connected with the ejector, the air inlet pipeline is respectively connected with the purging valve and the pressurizing valve, and the other end of the purging valve; the weighing sensor is positioned at the edge of the conveying tank body.
Preferably, the active agent storage and filtration unit comprises an active agent storage tank feeding port, an active agent storage tank, a high-efficiency storage tank dust remover, an ash discharge pneumatic valve, a storage tank exhaust valve, a storage tank high level indicator, a storage tank low level indicator and a storage tank discharging port; the storage tank pan feeding mouth is located the upper portion one side of active agent storage tank to the export of the sprayer in the closed dense phase conveying equipment links to each other, the high-efficient dust remover of storage tank is located the top of active agent storage tank, connect through pipeline and ash discharge pneumatic valve between the two, active agent storage tank side upper portion is equipped with discharge valve, be connected with the high-efficient dust remover of storage tank through the pipeline, the high charge level indicator of storage tank is located active agent storage tank upper portion, the low charge level indicator of storage tank is close to active agent storage tank lower part pyramis position, the storage tank discharge gate is located the bottom of active agent storage tank.
Preferably, the small automatic feeding metering and conveying equipment comprises a feeding feed valve, a feeding level indicator, a feeding exhaust valve, a feeding conveying tank body, a feeding discharge valve, a feeding ejector, a feeding purge valve, a feeding weighing sensor, a feeding pressurization valve and a feeding pressure transmitter; the reinforced conveying tank body is located the middle part position of small-size automatic material conveying measurement and conveying equipment, reinforced feed valve is located the upper portion center of the reinforced conveying tank body, link to each other with reinforced bleeder valve, reinforced charge level indicator, reinforced ooze valve and reinforced pressure transmitter are located the head position of the reinforced conveying tank body, reinforced discharge valve locates the head position of the reinforced conveying tank body, the lower part of the reinforced conveying tank body is located to reinforced bleeder valve, and be connected with reinforced sprayer, the pipeline that admits air links to each other with reinforced purge valve and reinforced ooze valve respectively, reinforced purge valve other end links to each other with reinforced sprayer, reinforced weighing sensor is located the border of the reinforced conveying tank body.
Preferably, the feeding weighing sensors are 3 and uniformly distributed.
Preferably, the temporary storage and dust removal unit comprises a temporary storage bin feeding port, a temporary storage bin high-efficiency dust remover, a filtered gas outlet, a metering bin gas inlet, a temporary storage bin and a temporary storage bin outlet; store storehouse pan feeding mouth and the reinforced sprayer in small-size automatic material conveying measurement and the conveying equipment and be connected, its entry height is less than the filter bag of storing the high-efficient dust remover in storehouse temporarily, stores the high-efficient dust remover in storehouse temporarily and stores the storehouse rigid coupling temporarily, forms an organic whole, and the filtered gas export is located the top of storing the high-efficient dust remover in storehouse temporarily, and measurement feed bin gas inlet is located the lateral part of storing the storehouse temporarily, stores the bottom that the storehouse export is located temporarily.
Preferably, the weighing, metering and anti-sticking unit comprises a metering bin, a temporary storage weighing sensor, a metal flexible connection, a feeding control valve, a stirring motor, an exhaust control valve and a stirring paddle; metering stock bin one side is equipped with the feed inlet, link to each other with the feed control valve through metal flexible coupling, the feed control valve is connected with the interim storehouse export of storing in interim storage and the dust removal unit, opposite side at the metering stock bin is equipped with an gas vent, install the air exhaust control valve, rethread pipeline links to each other with the gaseous entry of metering stock bin in interim storage and the dust removal unit, be equipped with agitator motor at metering stock bin middle part, the reconnection stirring thick liquid, middle part circumferencial direction at the metering stock bin is equipped with three interim storage weighing sensor.
Preferably, the double-helix continuous quantitative feeding unit comprises a variable frequency motor, a helix feeding port, a double-helix shaft, a helix outer tube, a helix discharging port and a discharging port which are in flexible connection; the spiral feeding port is connected with the bottom of a metering bin in the weighing, metering and anti-bonding unit, the double-spiral rotary shaft is positioned in the middle of the spiral outer pipe and penetrates through the spiral outer pipe, one end of the double-spiral rotary shaft is connected with the variable frequency motor, and the other end of the double-spiral rotary shaft is fixed at the outer end of the spiral and sealed; the spiral discharge gate is located the other end of spiral outer tube, and discharge gate flexible coupling is connected with the spiral discharge gate.
Preferably, the emergency stop cutting unit comprises a blockage clearing pneumatic valve, a blockage clearing hand valve, a pneumatic stop valve, a reaction kettle cutting hand valve and a reaction kettle; one end of the blockage clearing pneumatic valve is connected with factory air, the other end of the blockage clearing pneumatic valve is connected to the main blanking pipe through the blockage clearing hand valve, the pneumatic valve is arranged on the main blanking pipe and connected with an outlet soft connector in the double-helix continuous quantitative feeding unit, and a reaction kettle cutting hand valve is arranged at a feed inlet of the reaction kettle and connected with a pneumatic cut-off valve.
Has the advantages that:
the constant-pressure continuous quantitative feeding system for the activating agent of the alkylation device starts from ton bag unloading of the activating agent of the alkylation device until the quantitative feeding of the activating agent to the reaction kettle is completed, adopts an automatic and full-sealing mode in the whole process, and fundamentally solves the problems of unpacking, storage, metering, conveying, dust removal, continuous quantitative feeding, emergency stop and cut-off under abnormal working conditions and the like of the activating agent, thereby achieving the purposes of stabilizing the operation of the device, prolonging the service life of equipment and thoroughly solving the problem of dust pollution.
The invention is further described with reference to the following figures and detailed description, but is not meant to limit the scope of the invention.
Drawings
FIG. 1 is a schematic diagram of the configuration of an atmospheric continuous dosing system for alkylating agents in an alkylation unit according to example 1 of the present invention.
FIG. 2 is a schematic diagram of the construction of a closed discharger in an atmospheric continuous dosing system for an alkylation unit active agent according to example 1 of the present invention.
FIG. 3 is a schematic diagram of the active agent buffering and micro-negative pressure dust removal unit in the atmospheric pressure continuous dosing system for the active agent of the alkylation unit in example 1 of the present invention.
FIG. 4 is a schematic diagram of the closed dense phase transport apparatus of an atmospheric continuous dosing system for alkylation unit active agent in example 1 of the present invention.
FIG. 5 is a schematic diagram of the active agent storage and filtration unit of the atmospheric pressure continuous dosing system for alkylating device active agents in example 1 of the present invention.
FIG. 6 is a schematic structural diagram of a small-sized auto-feed metering and conveying apparatus in an atmospheric pressure continuous dosing system for alkylating agents in example 1 of the present invention.
FIG. 7 is a schematic diagram showing the structure of a temporary storage and dust removal unit in an atmospheric continuous dosing system for an alkylation unit active agent in example 1 of the present invention.
FIG. 8 is a schematic diagram showing the structure of the weight-metering and anti-sticking unit in the atmospheric pressure continuous dosing system for alkylating agent in example 1 of the present invention.
FIG. 9 is a schematic diagram showing the structure of a twin-screw continuous dosing unit in an atmospheric pressure continuous dosing system for alkylating an active agent in an alkylation unit according to example 1 of the present invention.
FIG. 10 is a schematic diagram showing the construction of an emergency stop shut-off unit in an atmospheric continuous dosing system for alkylating agents in example 1 of the present invention.
FIG. 11 is a schematic flow chart of the operation of an atmospheric continuous dosing system for alkylating agents in an alkylation unit according to example 1 of the present invention.
Detailed Description
The components employed in the device of the present invention are, unless otherwise specified, conventional components commercially available in the art; the adopted control systems are all conventional control systems available in the market in the technical field.
Names of main parts in the drawings
1 closed discharger and 2 active agent buffering and micro negative pressure dust removal unit
3 closed dense-phase conveying equipment 4 active agent storage and filtration unit
5 small-size automatic material conveying measurement and 6 temporary storage of conveying equipment and dust removal unit
7 weighing metering and anti-sticking unit 8 double-helix continuous quantitative feeding unit
9 Emergency stop shut-off Unit
1-1 beating plate 1-2 cylinder
1-3 closed unloading frame 1-4 diaphragm valve
1-5 lifting bag-pressing cylinder 1-6 blanking small hopper
2-1 buffer bin feed valve 2-2 buffer storage bin
2-3 buffer bin high-efficiency dust collector 2-4 dust return port
2-5 buffer storage bin discharge port
3-1 feeding valve 3-2 level indicator
3-3 exhaust valve 3-4 conveying tank body
3-5 discharge valve 3-6 ejector
3-7 purge valve 3-8 weighing sensor
3-9 air inlet valve 3-10 pressure transmitter
4-1 active agent storage tank material inlet 4-2 active agent storage tank
4-4 ash-discharging pneumatic valve of 4-3 high-efficiency dust remover for storage tank
4-5 storage tank exhaust valve 4-6 storage tank high level indicator
4-7 storage tank low level indicator 4-8 storage tank discharge port
5-1 feeding valve and 5-2 feeding level indicator
5-3 charging exhaust valve 5-4 charging conveying tank
5-5 charging and discharging valve and 5-6 charging injector
5-7 charging blowing valve 5-8 charging weighing sensor
5-9 charging air inlet valve 5-10 charging pressure transmitter
6-1 temporary storage bin feeding port 6-2 temporary storage bin high-efficiency dust remover
6-3 filtering gas outlet 6-4 metering bin gas inlet
6-5 temporary storage bin 6-6 temporary storage bin outlet
7-1 metering bin 7-2 temporary storage weighing sensor
7-3 metal flexible connection 7-4 feeding control valve
7-5 stirring motor 7-6 exhaust control valve
7-7 stirring paddle
8-1 variable frequency motor 8-2 spiral feeding port
8-3 double-screw shaft 8-4 spiral outer tube
8-5 spiral discharge port and 8-6 discharge port flexible connection
9-1 blockage clearing pneumatic valve 9-2 blockage clearing hand valve
9-3 pneumatic cut-off valve 9-4 reaction kettle cut-off hand valve
9-5 reaction kettle
Example 1
As shown in fig. 1, embodiment 1 of the present invention is a schematic structural diagram of an atmospheric continuous quantitative feeding system for an activator of an alkylation device, wherein 1 is a closed discharger, 2 is an activator buffer and micro-negative pressure dust removal unit, 3 is a closed dense phase conveying device, 4 is an activator storage and filtration unit, 5 is a small automatic feeding metering and conveying device, 6 is a temporary storage and dust removal unit, 7 is a weighing metering and anti-sticking unit, 8 is a double-helix continuous quantitative feeding unit, and 9 is an emergency shutdown cutting unit; the atmospheric pressure continuous dosing system for the alkylation unit active agent of the present invention comprises: the device comprises a closed discharger 1, an active agent buffering and micro-negative pressure dust removal unit 2, a closed dense-phase conveying device 3, an active agent storage and filtration unit 4, a small automatic feeding metering and conveying device 5, a temporary storage and dust removal unit 6, a weighing metering and anti-sticking unit 7, a double-helix continuous quantitative feeding unit 8 and an emergency stop cutting unit 9; the closed discharger 1 is connected with an active agent buffer and micro-negative pressure dust removal unit 2, the active agent buffer and micro-negative pressure dust removal unit 2 is connected with a closed dense-phase conveying device 3, the closed dense-phase conveying device 3 is respectively connected with an active agent storage and filtering unit 4, a small automatic feeding metering and conveying device 5 and an emergency stop cutting unit 9, the active agent storage and filtering unit 4 is connected with the small automatic feeding metering and conveying device 5, the small automatic feeding metering and conveying device 5 is connected with a temporary storage and dust removal unit 6, the temporary storage and dust removal unit 6 is connected with a weighing metering and anti-sticking unit 7, the weighing metering and anti-sticking unit 7 is connected with a double-spiral continuous quantitative feeding unit 8, and the double-spiral continuous quantitative feeding unit 8 is connected with the emergency stop cutting unit 9;
as shown in FIG. 2, example 1 of the present invention is a schematic view of a closed discharger of an atmospheric continuous quantitative feeding system for an alkylation unit active agent; wherein, 1-1 is a beating plate, 1-2 is an air cylinder, 1-3 is a closed unloading frame, 1-4 is an aperture valve, 1-5 is a bag lifting and pressing air cylinder, and 1-6 is a small blanking hopper; example 1 of the present invention a closed discharger for an atmospheric continuous dosing system of an active agent for an alkylation unit comprises: 1-1 part of beating plate, 1-2 parts of cylinder, 1-3 parts of sealed unloading frame, 1-4 parts of diaphragm valve, 1-5 parts of lifting bag pressing cylinder and 1-6 parts of small blanking bucket; wherein, the beating plate 1-1 is connected with the cylinder 1-2, the cylinders 1-2 are four groups in total and are respectively fixed on the periphery of the closed unloading frame 1-3, the aperture valve 1-4 is arranged at the center of the closed unloading frame 1-3, the lifting pressure bag cylinder 1-5 is fixed above the inlet of the small blanking hopper 1-6, the small blanking hopper 1-6 is fixedly connected with the closed unloading frame 1-3 through a connecting pipe, and the small blanking hopper 1-6 is connected with the buffer bin feed valve 2-1 in the active agent buffer and micro-negative pressure dust removal unit 2;
as shown in fig. 3, in example 1 of the present invention, a schematic structural diagram of an active agent buffering and micro-negative pressure dust removal unit in an atmospheric pressure continuous quantitative feeding system for an active agent of an alkylation apparatus is shown, where 2-1 is a buffer bin feed valve, 2-2 is a buffer storage bin, 2-3 is a buffer bin high efficiency dust remover, 2-4 is a dust return port, and 2-5 is a buffer storage bin discharge port; embodiment 1 of the present invention an active agent buffering and micro-negative pressure dust removal unit in an atmospheric pressure continuous quantitative feeding system for an active agent of an alkylation device comprises: a buffer bin feed valve 2-1, a buffer storage bin 2-2, a buffer bin high-efficiency dust remover 2-3, a dust return port 2-4 and a buffer storage bin discharge port 2-5, the upper end of a feeding valve 2-1 of a buffer storage bin is connected with a lower small hopper 1-6 in a graph 2 through a pipeline, the lower end of the feeding valve 2-1 is installed at an inlet of the buffer storage bin 2-2 through a pipeline, a buffer bin high-efficiency dust remover 2-3 is arranged on one side of the upper portion of the buffer storage bin 2-2, a discharging port 2-5 of the buffer storage bin is positioned at the lower end of the buffer storage bin 2-2, a dust return port 2-4 is arranged at the upper portion of the buffer storage bin 2-2, and the discharging port 2-5 of the buffer storage bin is connected with the feeding valve 3-1 in the closed dense-phase conveying equipment 3 through a pipeline;
as shown in FIG. 4, example 1 of the present invention is a schematic diagram of the closed dense phase transport apparatus in an atmospheric continuous dosing system for alkylating agent; wherein 3-1 is a feed valve, 3-2 is a level indicator, 3-3 is an exhaust valve, 3-4 is a conveying tank body, 3-5 is a discharge valve, 3-6 is an injector, 3-7 is a purge valve, 3-8 is an air inlet valve, and 3-9 is a pressure transmitter; embodiment 1 of the present invention a closed dense phase transport apparatus for use in an atmospheric continuous dosing system for alkylating device active agents comprising: 3-1 parts of a feed valve, 3-2 parts of a level indicator, 3-3 parts of an exhaust valve, 3-4 parts of a conveying tank body, 3-5 parts of a discharge valve, 3-6 parts of an injector, 3-7 parts of a purge valve, 3-8 parts of an air inlet valve and 3-9 parts of a pressure transmitter; wherein, the conveying tank body 3-4 is positioned in the middle of the closed dense phase conveying equipment, the feed valve 3-1 is positioned in the center of the upper part of the conveying tank body 3-4 and is connected with the discharge port 2-5 of the buffer storage bin, the level indicator 3-2, the pressure valve 3-8 and the pressure transmitter 3-9 are positioned at the end enclosure part of the conveying tank body 3-4, the exhaust valve 3-3 is arranged at the end enclosure part of the conveying tank body 3-4, the discharge valve 3-5 is arranged at the lower part of the conveying tank body 3-4 and is connected with the ejector 3-6, the air inlet pipeline is respectively connected with the purge valve 3-7 and the pressure valve 3-8, and the other end of the purge valve 3-7 is connected with the ejector 3; the ejector outlet is connected with the active agent storage and filtration unit;
as shown in fig. 5, the structure of an active agent storage and filtration unit in an atmospheric continuous quantitative feeding system for an active agent of an alkylation device in embodiment 1 of the present invention is schematically illustrated, wherein 4-1 is a feed port of an active agent storage tank, 4-2 is the active agent storage tank, 4-3 is a high-efficiency dust remover of the storage tank, 4-4 is an ash discharge pneumatic valve, 4-5 is an exhaust valve of the storage tank, 4-6 is a high level gauge of the storage tank, 4-7 is a low level gauge of the storage tank, and 4-8 is a discharge port of the storage tank; the embodiment 1 of the invention relates to an active agent storage and filtration unit in an atmospheric continuous quantitative feeding system for an active agent of an alkylation device, which comprises an active agent storage tank feeding port 4-1, an active agent storage tank 4-2, a storage tank high-efficiency dust remover 4-3, an ash discharge pneumatic valve 4-4, a storage tank exhaust valve 4-5, a storage tank high-level indicator 4-6, a storage tank low-level indicator 4-7 and a storage tank discharge port 4-8, wherein the storage tank feeding port 4-1 is positioned at one side of the upper part of the active agent storage tank 4-2 and is connected with an outlet of an ejector 3-6 in figure 4, the storage tank high-efficiency dust remover 4-3 is positioned above the active agent storage tank 4-2 and is connected with the ash discharge pneumatic valve 4-4 through a pipeline, the exhaust valve 4-5 is arranged at the upper part of the side edge of the active agent storage tank, the device is connected with a high-efficiency dust remover 4-3 of the storage tank through a pipeline, a high level indicator 4-6 of the storage tank is positioned at the upper part of an active agent storage tank 4-2, a low level indicator 4-7 of the storage tank is close to the lower cone part of the active agent storage tank 4-2, and a discharge hole 4-8 of the storage tank is positioned at the bottom of the active agent storage tank 4-2;
as shown in fig. 6, the structure of a small-sized automatic feeding metering and conveying device in an atmospheric pressure continuous quantitative feeding system for an alkylating device active agent in embodiment 1 of the present invention is schematically illustrated; wherein, 5-1 is a charging feed valve, 5-2 is a charging level indicator, 5-3 is a charging exhaust valve, 5-4 is a charging conveying tank body, 5-5 is a charging discharge valve, 5-6 is a charging ejector, 5-7 is a charging purge valve, 5-8 is a charging weighing sensor, 5-9 is a charging air inlet valve, and 5-10 is a charging pressure transmitter; the embodiment 1 of the invention is used for the continuous quantitative feed system of normal pressure of the alkylating device active agent small-and-medium-sized automatic charging to measure and transport equipment and include: 5-1 parts of a feeding feed valve, 5-2 parts of a feeding level indicator, 5-3 parts of a feeding exhaust valve, 5-4 parts of a feeding conveying tank body, 5-5 parts of a feeding discharge valve, 5-6 parts of a feeding ejector, 5-7 parts of a feeding purge valve, 5-8 parts of a feeding weighing sensor, 5-9 parts of a feeding air inlet valve and 5-10 parts of a feeding pressure transmitter; wherein, the charging and conveying tank body 5-4 is positioned at the middle position of the small automatic charging and metering and conveying device, the charging and feeding valve 5-1 is positioned at the center of the upper part of the charging and conveying tank body 5-4 and is connected with the charging and discharging valve 5-5, the charging level indicator 5-2, the charging and pressurizing valve 5-9 and the charging pressure transmitter 5-10 are positioned at the end enclosure part of the charging and conveying tank body 5-4, the charging and discharging valve 5-3 is positioned at the end enclosure part of the charging and conveying tank body 5-4, the charging and discharging valve 5-5 is positioned at the lower part of the charging and conveying tank body 5-4 and is connected with the charging and spraying device 5-6, the air inlet pipeline is respectively connected with the charging and purging valve 5-7 and the charging and pressurizing valve 5-9, the other end of, 3 feeding weighing sensors 5-8 are positioned at the edge of the feeding conveying tank body 5-4 in total and are uniformly distributed;
as shown in FIG. 7, example 1 of the present invention is a schematic view showing the structure of a temporary storage and dust removal unit in an atmospheric pressure continuous dosing system for an active agent of an alkylation unit, the device comprises a temporary storage bin feeding port 6-1, a temporary storage bin high-efficiency dust remover 6-2, a filtered gas outlet 6-3, a metering bin gas inlet 6-4, a temporary storage bin 6-5 and a temporary storage bin outlet 6-6, wherein the temporary storage and dust removal unit in the normal-pressure continuous quantitative feeding system for the alkylating device active agent in embodiment 1 comprises the temporary storage bin feeding port 6-1, the temporary storage bin high-efficiency dust remover 6-2, the filtered gas outlet 6-3, the metering bin gas inlet 6-4, the temporary storage bin 6-5 and the temporary storage bin outlet 6-6; the feeding port 6-1 of the storage bin is connected with a feeding ejector 5-6 in the small-sized automatic feeding metering and conveying device, the height of the inlet of the feeding port is lower than that of a filter bag of the temporary storage bin high-efficiency dust remover 6-2, the temporary storage bin high-efficiency dust remover 6-2 is fixedly connected with the temporary storage bin 6-5 to form a whole, a filtering gas outlet 6-3 is positioned at the top of the temporary storage bin high-efficiency dust remover 6-2, a metering bin gas inlet 6-4 is positioned at the side part of the temporary storage bin 6-5, and a temporary storage bin outlet 6-6 is positioned at the bottom of the temporary storage bin 6-5;
as shown in fig. 8, example 1 of the present invention is a schematic view of a structure of a weighing and anti-sticking unit of an atmospheric pressure continuous dosing system for alkylating device active agents, the weighing, metering and anti-sticking unit of the normal-pressure continuous quantitative feeding system for the active agent of the alkylation device in the embodiment 1 comprises a metering bin 7-1, a temporary storage weighing sensor 7-2, a temporary storage weighing sensor 7-3, a feeding control valve 7-4, a stirring motor 7-5, an exhaust control valve 7-6 and a stirring slurry 7-7, wherein the metering bin 7-1, the temporary storage weighing sensor 7-2, the metal flexible connection 7-3, the feeding control valve 7-4, the stirring motor 7-5, the exhaust control valve 7-6 and the stirring slurry 7-7; a feeding hole is formed in one side of a metering bin 7-1 and is connected with a feeding control valve 7-4 through a metal flexible connection 7-3, the feeding control valve 7-4 is connected with a temporary storage bin outlet 6-6 in a temporary storage and dust removal unit, an exhaust port is formed in the other side of the metering bin 7-1 and is provided with an exhaust control valve 7-6, the exhaust control valve is connected with a metering bin gas inlet 6-4 in the temporary storage and dust removal unit through a pipeline, a stirring motor 7-5 is arranged in the middle of the metering bin 7-1 and is connected with a stirring slurry 7-7, and three temporary storage weighing sensors 7-2 are arranged in the middle of the metering bin 7-1 in the circumferential direction and are used for weighing equipment;
FIG. 9 is a schematic structural diagram of a double-screw continuous quantitative feeding unit in an atmospheric continuous quantitative feeding system for alkylating device active agent in example 1 of the present invention, wherein 8-1 is a variable frequency motor, 8-2 is a screw feeding port, 8-3 is a double-screw shaft, 8-4 is a screw outer tube, 8-5 is a screw discharging port, and 8-6 is a soft connection of the discharging port; the double-helix continuous quantitative feeding unit in the normal-pressure continuous quantitative feeding system for the alkylating device active agent in the embodiment 1 of the invention comprises a variable frequency motor 8-1, a helix feeding port 8-2, a double-helix shaft 8-3, a helix outer tube 8-4, a helix discharging port 8-5 and a discharging port soft connection 8-6; a spiral feeding port 8-2 is connected with the bottom of a metering bin 7-1 in the weighing, metering and anti-bonding unit, a double-spiral rotary shaft 8-3 is positioned in the middle of a spiral outer pipe 8-4 and penetrates through the spiral outer pipe 8-4, one end of the double-spiral rotary shaft is connected with a variable frequency motor 8-1, and the other end of the double-spiral rotary shaft is fixed at the outer end of the spiral and sealed; the spiral discharge port 8-5 is positioned at the other end of the spiral outer pipe 8-4, and the discharge port flexible connection 8-6 is connected with the spiral discharge port 8-5 so as to be convenient for weighing and metering;
FIG. 10 is a schematic structural view of an emergency stop and shut-off unit of an activating agent continuous quantitative feeding device for an alkylation device in example 1 of the present invention, wherein 9-1 is a block-removing pneumatic valve, 9-2 is a block-removing hand valve, 9-3 is a pneumatic shut-off valve, 9-4 is a reaction vessel shut-off hand valve, and 9-5 is a reaction vessel; the emergency stop cutting unit for the continuous quantitative feeding device of the active agent of the alkylation device in the embodiment 1 comprises a blockage removing pneumatic valve 9-1, a blockage removing hand valve 9-2, a pneumatic stop valve 9-3, a reaction kettle cutting hand valve 9-4 and a reaction kettle 9-5; one end of a blockage removing pneumatic valve 9-1 is connected with factory air, the other end of the blockage removing pneumatic valve is connected to a main blanking pipe through a blockage removing hand valve 9-2, a pneumatic valve 9-3 is arranged on the main blanking pipe and is connected with an outlet soft connection 8-6 in a double-helix continuous quantitative feeding unit, and a reaction kettle cutting hand valve 9-4 connected with a pneumatic cutting valve 9-3 is arranged at a feeding port of a reaction kettle 9-5.
The working process of the constant-pressure continuous quantitative feeding system for the activating agent of the alkylation device is as follows:
the closed discharger 1 has the function of closed discharging and prevents the direct contact of an active agent with air and an operator, a lower discharge port of a small discharge hopper 1-6 of the closed discharger 1 is connected with an active agent buffering and micro-negative pressure dust removal unit 2, the active agent buffering and micro-negative pressure dust removal unit 2 is opened during discharging, micro-negative pressure is formed in a buffering storage bin 2-2, generated dust-containing gas is filtered and discharged through a high-efficiency dust remover 2-3 of the buffering bin, the active agent enters a closed dense-phase conveying device 3 and is conveyed to an active agent storing and filtering unit 4 through air pressure, the dust-containing gas is discharged after being filtered, in the production process of the device, the active agent in an active agent storage tank 4-2 is conveyed to a temporary storage and dust removal unit 6 after being weighed and measured through a small-sized automatic feeding and metering and conveying device 5, and then is continuously fed through a double-helix continuous quantitative feeding unit 8, the weighing, metering and anti-sticking unit 7 carries out logical operation on the feeding speed, the motor frequency of the double-helix continuous feeding unit 8 is adjusted in real time, the feeding amount in unit time meets the process requirement, the emergency stop cutting unit 9 is automatically started under the abnormal operation condition of the alkylation device, the pneumatic cut-off valve 9-3 is rapidly closed, and the double-helix quantitative feeding unit 8 automatically stops running;
after the ton bag active agent is transported to an alkylation device site from a warehouse, firstly, an electric hoist is used for hoisting the ton bag active agent to the upper part of a closed discharger 1 for closed micro-negative pressure unpacking, the active agent in the ton bag automatically flows into a bottom active agent buffering and buffering storage bin 2-2 in a micro-negative pressure dust removal unit 2 of the closed discharger 1, dust-containing gas is discharged after being filtered and removed by a buffering bin high-efficiency dust remover 2-3 at the top of the buffering storage bin 2-2, and micro-negative pressure is formed in the buffering storage bin 2-2, so that the smooth unloading of the closed discharger 1 is ensured, and no dust overflows; then, after the active agent in the buffer storage bin 2-2 is pressurized and fluidized by a closed dense-phase conveying system 3, the active agent is conveyed to an active agent storage tank 4-2 in an active agent storage and filtration unit in batches for storage, the dust-containing gas is discharged after being filtered, in the production process of the device, the active agent in the active agent storage tank 4-2 is conveyed to a temporary storage and dust removal unit 6 after being weighed and measured by a small automatic feeding and conveying device 5, then the double-helix continuous quantitative feeding unit 8 is used for continuously feeding, the weighing, measuring and anti-sticking unit 7 is used for carrying out logic operation on the feeding speed, the motor frequency of the double-helix continuous feeding unit 8 is adjusted in real time, the feeding amount in unit time is ensured to meet the process requirements, under the abnormal operation condition of the alkylation device, the emergency stop cutting unit 9 is automatically started, the blanking pipe pneumatic cutting valve 9-3 is rapidly closed, the double spiral continuous feeding unit 8 automatically stops running.
FIG. 11 is a schematic flow chart of the operation of an atmospheric continuous dosing system for alkylating agent in an alkylation unit according to example 1 of the present invention; the process operation process comprises a closed discharger 1 (big-bag closed discharger), an active agent buffering and micro-negative pressure dust removal unit 2, closed dense-phase conveying equipment 3, an active agent storage and filtration unit 4, small automatic feeding metering and conveying equipment 5, a temporary storage and dust removal unit 6, a weighing metering and anti-sticking unit 7, a double-helix continuous quantitative feeding unit 8 and an emergency stopping and cutting unit 9, wherein the closed discharger 1 has the function of closed discharging agent and prevents the active agent from directly contacting with air and operators, a discharge hopper outlet of the closed discharger 1 is connected with a buffer hopper feeding port of the active agent buffering and micro-negative pressure dust removal unit 2, when discharging, an efficient dust remover of the active agent buffering and micro-negative pressure dust removal unit 2 is opened to form micro-negative pressure in the buffer hopper, and generated dust-containing gas is filtered and discharged by the efficient dust remover of the buffer hopper, the active agent enters the closed dense-phase conveying 3 device, then is conveyed to the active agent storage and filtering unit 4 through air pressure, the dust-containing gas is discharged after being filtered, in the production process of the device, the active agent in the storage tank is conveyed to the temporary storage and dust removal unit 6 after being weighed and measured by the small-sized automatic feeding and measuring and conveying device 5, then is continuously fed by the weighing, measuring and anti-sticking unit 7 and the double-helix continuous quantitative feeding unit 8, the weighing, measuring and anti-sticking unit 7 performs logic operation on the feeding speed, the motor frequency of the double-helix continuous quantitative feeding unit 8 is adjusted in real time, the feeding amount in unit time is ensured to meet the process requirements, under the abnormal operation condition of the alkylation device, the emergency stop cutting unit 9 is automatically started, the blanking pipe pneumatic cut-off valve 9-3 is rapidly closed, and the quantitative feeding system automatically stops running;
when the closed discharger 1 works, the lower discharge hole of the active agent packaging bag is manually sleeved on the inner pipe of the small discharge hopper 1-6, and the lower discharge hole of the active agent packaging bag is tightly bundled by the automatic lifting bag pressing cylinder 1-5; after the bag mouth is opened manually, the active agent in the bag enters an active agent buffering and micro-negative pressure dust removal unit 2 through the small hopper 1-6 outlets under the action of gravity; after the active agent in the packaging bag is emptied, opening a beating plate 1-1 to beat the active agent packaging bag, so that all the active agent remained on the inner wall of the packaging bag can fall into an active agent buffer hopper and a micro negative pressure dust removal unit 2, and in order to prevent the dust of the residual active agent from scattering when the empty bag is taken out from a closed discharger 1, closing an aperture valve 1-4 of the closed discharger before the bag is taken out and tightly binding the opening of the empty bag, so as to ensure that no leakage exists in the unpacking and discharging processes, and the whole unpacking and discharging processes are closed and no dust overflows;
the active agent buffering and micro-negative pressure dust removal unit 2 is mainly used for buffering storage and micro-negative pressure filtering dust removal 2 of ton bag active agents after the ton bag active agents are discharged in a closed mode through a closed discharger 1, the active agents of the closed discharger 1 flow into a buffering storage bin 2-2 by weight, dust-containing gas in the buffering storage bin 2-2 is discharged after being filtered by a high-efficiency dust remover 2-3 and reaches the standard, a fan of the dust remover is used for exhausting air, and micro-negative pressure is formed in the buffering storage bin 2-2, so that dust is prevented from overflowing;
the closed dense-phase conveying equipment 3 is mainly used for conveying the active agent in the buffer storage hopper to the active agent storage and filtration unit 4 in a closed mode through the closed dense-phase conveying equipment 3, the active agent in the buffer storage bin 2-2 flows into a pressure feed tank of the closed dense-phase conveying equipment 3 by means of gravity, after the material in the pressure feed tank reaches a high material level, a control system automatically closes a feed valve 3-1 and an exhaust valve 3-3, and an air inlet valve 3-9 is opened to charge the pressure in the pressure feed tank; after the set high pressure point is reached in the tank, the conveying valves 3-7 and the discharge valves 3-5 are opened in sequence, and the active agent is hermetically and densely conveyed to the active agent storage and filtration unit 4 through the ejectors 3-6;
the active agent storage and filtration unit 4 is mainly used for on-site storage of active agents so as to facilitate continuous application of an alkylation device, the active agents conveyed by the closed dense-phase conveying equipment 3 are intercepted and filtered by a storage tank high-efficiency dust collector 4-3 arranged at the top of a storage bin, the active agents are stored in a survival agent storage tank 4-2, filtered clean gas is discharged through a uniform discharge pipeline in a plant area, and after each batch of active agents are canned in batches, the storage bin is filled with 0.05-0.3 MPa of nitrogen for protection, so that the active agents in the storage bin are prevented from being wetted and agglomerated;
the small automatic feeding metering and conveying equipment 5 mainly can realize the timing, quantification and balance of the active agent and automatically add the active agent to the temporary storage and dust removal unit 6, and when the equipment works, a feeding exhaust valve 5-3 is opened, a feeding feed valve 5-1 is opened in a delayed mode, and the active agent automatically flows to a feeding conveying tank 5-4 by utilizing the gravity of the material; when the material is at the set weight (or level), the feed charging valve 5-1 and the feed discharging valve 5-3 are closed; then, the feeding air inlet valve 5-9 is opened, the feeding conveying tank 5-4 starts to be pressurized to a set pressure, the feeding blow valve 5-7 and the feeding discharge valve 5-5 are opened in sequence, and the system starts to convey materials; when the pressure of the conveying tank reaches the lower limit, closing the feeding air inlet valve 5-9 and the feeding discharge valve 5-5, and closing the feeding purge valve 5-7 in a delayed manner, so that the whole conveying process is finished, the weighing instrument is automatically reset, and the feeding weight and the feeding interval time can be adjusted according to the process requirements;
the device comprises a temporary storage and dust removal unit 6, wherein the temporary storage and dust removal unit mainly receives an active agent sent by small-sized automatic feeding metering and conveying equipment 5 so as to facilitate the continuous application of an alkylation device, the materials and dust-containing gas conveyed by the small-sized automatic feeding metering and conveying equipment 5 are intercepted and filtered by a high-efficiency dust remover 6-2 arranged at the top of a storage bin, the active agent is stored in the temporary storage bin 6-5, the filtered clean gas is discharged through a uniform discharge pipeline in a plant area, and in order to ensure that the active agent is not affected with damp and not agglomerated, the unit only receives a certain amount of active agent every time, so that the active agent in the temporary storage unit is ensured to be used up in hours;
the weighing, metering and anti-sticking unit 7 is characterized in that a cover plate is sealed at the upper part of a metering bin 7-1, a stirring mechanism is arranged, and a stirring motor 7-5 is used for driving a stirring paddle 7-7 to stir the active agent in the bin, so that the situation of unsmooth blanking of the bin is prevented; the dust-containing gas of a metering bin 7-1 is connected to a gas inlet 6-4 of the metering bin through a 7-6 exhaust control valve, enters a dust remover for filtration and interception, and is discharged after reaching the standard, when a temporary storage bin high-efficiency dust remover 6-2 stops working, a unit automatically closes the exhaust control valve 7-6 on an outlet pipeline of the metering bin 7-1 to prevent the active agent from absorbing moisture and caking, the lower part of the metering bin 7-1 is provided with three temporary storage weighing sensors 7-2 and a display meter head, and the weight, the feeding speed and the like of the active agent in the bin are displayed in real time through weighing and automatic logic operation on the bin;
the double-helix continuous quantitative feeding unit 8 is arranged at the bottom of the metering bin 7-1, and the continuous adjustment of the rotation speed of the double helix is realized by adjusting the frequency of the double-helix variable frequency motor 8-1 and the speed reduction adjustment function of a multi-stage gear reducer; real-time data of the feeding amount is calculated and fed back by a DCS control system, and the motor frequency is adjusted in real time, so that the feeding amount meets the process requirement;
the device comprises an emergency stop cutting unit 9, wherein the emergency stop cutting unit 9 is arranged below a discharge port at the bottom of a double-screw feeder in a flexible connection mode 8-6, when an alkylation device is in an abnormal production working condition, a pneumatic cut-off valve 9-3 on a discharging pipe can be closed in an emergency mode, hydrocarbon gas in a reaction kettle 9-5 is prevented from returning to an active agent inlet pipeline, the hydrocarbon gas is mixed with an active agent and agglomerated to block the discharging pipeline, after a feeding system is cut off in an emergency mode, a nitrogen purging line is started to open a blockage removing pneumatic valve 9-1, the discharging pipe is purged under pressure, residual active agent in the discharging pipe is purged completely, and under the condition that the discharging pipe is seriously blocked, the blockage removing valve 9-2 capable of opening the discharging pipe is manually cleaned.
The constant-pressure continuous quantitative feeding system for the activator of the alkylation device solves the problems that the activator dust has strong corrosivity to a site steel structure and a platform during the filling of the activator, the scattered activator causes damage to the health of workers, hydrocarbon gas is easy to agglomerate after contacting with the activator, a feeding pipeline above a reaction kettle is easy to block due to wall hanging, the addition amount of the activator cannot be accurately measured without a measuring system, and the like.
The invention fundamentally solves the problems that the whole device is operated in a closed state during the processes of unpacking, storing, metering, conveying, dedusting and continuous quantitative feeding of the active agent during agent unloading, no dust is leaked, and the pollution problem generated in the process of adding the active agent is well solved.
The constant-pressure continuous quantitative feeding system for the activating agent of the alkylation device solves the problems of accurate addition and metering of the activating agent, caking and wall hanging of hydrocarbon gas in a reaction kettle after the hydrocarbon gas is contacted with the activating agent and easy blockage of a pipeline, and fundamentally solves the problems of pollution caused by dust leakage of the activating agent during agent loading and occupational hazards to operators.
Claims (10)
1. An atmospheric continuous dosing system for an alkylation unit active agent, comprising: the device comprises a closed discharger, an active agent buffering and micro-negative pressure dust removal unit, closed dense-phase conveying equipment, an active agent storage and filtration unit, small automatic feeding metering and conveying equipment, a temporary storage and dust removal unit, a weighing metering and anti-bonding unit, a double-helix continuous quantitative feeding unit and an emergency stop cutting unit; the closed discharger is connected with the active agent buffer and micro-negative pressure dust removal unit, the active agent buffer and micro-negative pressure dust removal unit is connected with the closed dense-phase conveying equipment, the closed dense-phase conveying equipment is connected with the active agent storage and filtering unit, the active agent storage and filtering unit is connected with the small automatic feeding metering and conveying equipment, the small automatic feeding metering and conveying equipment is connected with the temporary storage and dust removal unit, the temporary storage and dust removal unit is connected with the weighing metering and anti-sticking unit, the weighing metering and anti-sticking unit is connected with the double-helix continuous quantitative feeding unit, and the double-helix continuous quantitative feeding unit is connected with the emergency stopping and cutting unit, so that a complete quantitative feeding process is completed.
2. The atmospheric continuous dosing system for an alkylation unit active agent according to claim 1, wherein: the closed unloading device comprises a beating plate, a cylinder, a closed unloading frame, an aperture valve, a lifting bag pressing cylinder and a small unloading hopper; the beating plate is connected with the cylinder, the diaphragm valve is arranged in the middle of the closed unloading frame, the lifting bag pressing cylinder is fixed below the inlet of the small blanking hopper, and the small blanking hopper is fixed with the closed unloading frame through a connecting pipe; four groups of cylinders are arranged and are respectively fixed on the periphery of the closed discharging rack.
3. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 2, wherein: the active agent buffering and micro-negative pressure dust removal unit comprises a buffering bin feed valve, a buffering storage bin, a buffering bin high-efficiency dust remover, a dust return port and a buffering storage bin discharge port, wherein the upper end of the feed valve is connected with a lower small hopper in an airtight discharger through a pipeline, the lower end of the feed valve is installed at an inlet of the buffering storage bin through a pipeline, one side of the upper part of the buffering storage bin is provided with the buffering bin high-efficiency dust remover, the buffering storage bin discharge port is located at the lower end of the buffering storage bin, and the dust return port is located at the upper part of the buffering storage bin.
4. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 3, wherein: the closed dense-phase conveying equipment comprises a feed valve, a level indicator, an exhaust valve, a conveying tank body, a discharge valve, an ejector, a purge valve, a pressurization valve and a pressure transmitter; the conveying tank body is positioned in the middle of the closed dense-phase conveying equipment, the feeding valve is positioned in the center of the upper part of the conveying tank body and is connected with a discharge port of the buffer storage bin, the level indicator, the pressurizing valve and the pressure transmitter are positioned at the end socket part of the conveying tank body, the exhaust valve is arranged at the end socket part of the conveying tank body, the discharge valve is arranged at the lower part of the conveying tank body and is connected with the ejector, the air inlet pipeline is respectively connected with the purging valve and the pressurizing valve, and the other end of the purging valve; the weighing sensor is positioned at the edge of the conveying tank body.
5. The atmospheric continuous dosing system for an alkylation unit active agent according to claim 4, wherein: the active agent storage and filtration unit comprises an active agent storage tank feeding port, an active agent storage tank, a high-efficiency storage tank dust remover, an ash discharge pneumatic valve, a storage tank exhaust valve, a storage tank high level indicator, a storage tank low level indicator and a storage tank discharging port; the storage tank pan feeding mouth is located the upper portion one side of active agent storage tank to the export of the sprayer in the closed dense phase conveying equipment links to each other, the high-efficient dust remover of storage tank is located the top of active agent storage tank, connect through pipeline and ash discharge pneumatic valve between the two, active agent storage tank side upper portion is equipped with discharge valve, be connected with the high-efficient dust remover of storage tank through the pipeline, the high charge level indicator of storage tank is located active agent storage tank upper portion, the low charge level indicator of storage tank is close to active agent storage tank lower part pyramis position, the storage tank discharge gate is located the bottom of active agent storage tank.
6. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 5, wherein: the small-sized automatic feeding metering and conveying equipment comprises a feeding feed valve, a feeding level indicator, a feeding exhaust valve, a feeding conveying tank body, a feeding discharge valve, a feeding ejector, a feeding purge valve, a feeding weighing sensor, a feeding pressurization valve and a feeding pressure transmitter; the feeding and conveying tank body is positioned in the middle of the small automatic feeding metering and conveying equipment, the feeding and feeding valve is positioned in the center of the upper part of the feeding and conveying tank body and is connected with the feeding and discharging valve, the feeding level indicator, the feeding pressurization valve and the feeding pressure transmitter are positioned at the end socket part of the feeding and conveying tank body, the feeding and discharging valve is arranged at the lower part of the feeding and conveying tank body and is connected with the feeding ejector, the air inlet pipeline is respectively connected with the feeding and purging valve and the feeding pressurization valve, the other end of the feeding and purging valve is connected with the feeding; the number of the charging weighing sensors is 3, and the charging weighing sensors are uniformly distributed.
7. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 6, wherein: the temporary storage and dust removal unit comprises a temporary storage bin feeding port, a temporary storage bin high-efficiency dust remover, a filtered gas outlet, a metering bin gas inlet, a temporary storage bin and a temporary storage bin outlet; store storehouse pan feeding mouth and the reinforced sprayer in small-size automatic material conveying measurement and the conveying equipment and be connected, its entry height is less than the filter bag of storing the high-efficient dust remover in storehouse temporarily, stores the high-efficient dust remover in storehouse temporarily and stores the storehouse rigid coupling temporarily, forms an organic whole, and the filtered gas export is located the top of storing the high-efficient dust remover in storehouse temporarily, and measurement feed bin gas inlet is located the lateral part of storing the storehouse temporarily, stores the bottom that the storehouse export is located temporarily.
8. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 7, wherein: the weighing, metering and anti-sticking unit comprises a metering bin, a temporary storage weighing sensor, a metal flexible connector, a feeding control valve, a stirring motor, an exhaust control valve and stirring slurry; metering stock bin one side is equipped with the feed inlet, link to each other with the feed control valve through metal flexible coupling, the feed control valve is connected with the interim storehouse export of storing in interim storage and the dust removal unit, opposite side at the metering stock bin is equipped with an gas vent, install the air exhaust control valve, rethread pipeline links to each other with the gaseous entry of metering stock bin in interim storage and the dust removal unit, be equipped with agitator motor at metering stock bin middle part, the reconnection stirring thick liquid, middle part circumferencial direction at the metering stock bin is equipped with three interim storage weighing sensor.
9. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 8, wherein: the double-helix continuous quantitative feeding unit comprises a variable frequency motor, a helix feeding port, a double-helix shaft, a helix outer pipe, a helix discharging port and a discharging port which are in flexible connection; the spiral feeding port is connected with the bottom of a metering bin in the weighing, metering and anti-bonding unit, the double-spiral rotary shaft is positioned in the middle of the spiral outer pipe and penetrates through the spiral outer pipe, one end of the double-spiral rotary shaft is connected with the variable frequency motor, and the other end of the double-spiral rotary shaft is fixed at the outer end of the spiral and sealed; the spiral discharge gate is located the other end of spiral outer tube, and discharge gate flexible coupling is connected with the spiral discharge gate.
10. An atmospheric continuous dosing system for an alkylation unit active agent according to claim 9, wherein: the emergency stop cutting unit comprises a blockage removing pneumatic valve, a blockage removing hand valve, a pneumatic stop valve, a reaction kettle cutting hand valve and a reaction kettle; one end of the blockage clearing pneumatic valve is connected with factory air, the other end of the blockage clearing pneumatic valve is connected to the main blanking pipe through the blockage clearing hand valve, the pneumatic valve is arranged on the main blanking pipe and connected with an outlet soft connector in the double-helix continuous quantitative feeding unit, and a reaction kettle cutting hand valve is arranged at a feed inlet of the reaction kettle and connected with a pneumatic cut-off valve.
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| CN114130335A (en) * | 2021-11-19 | 2022-03-04 | 浙江圣效化学品有限公司 | Preparation method of p-hydroxybenzoic acid |
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Application publication date: 20201211 |