CN211443564U - Acrylonitrile storage system for preparing acrylamide crystal - Google Patents
Acrylonitrile storage system for preparing acrylamide crystal Download PDFInfo
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- CN211443564U CN211443564U CN201922280017.8U CN201922280017U CN211443564U CN 211443564 U CN211443564 U CN 211443564U CN 201922280017 U CN201922280017 U CN 201922280017U CN 211443564 U CN211443564 U CN 211443564U
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Abstract
The utility model relates to an acrylonitrile storage system for preparing acrylamide crystals, which comprises a storage component, wherein the storage component comprises an acrylonitrile storage tank, and the top end of the acrylonitrile storage tank is provided with a pressure regulating port, a nitrogen seal and a safety port; the feeding conveying assembly comprises an acrylonitrile tank truck, a feeding conveying pipeline and an unloading pump; the discharging conveying assembly comprises a discharging conveying channel and a conveying channel; a tail gas treatment assembly comprising an acrylonitrile tail gas absorption tower; a protection subassembly, the protection subassembly includes nitrogen gas supply pipe, running water feed pipe, foam feed pipe, sprays the mouth. The utility model has the advantages that: the utility model provides a storage system adopts the cooperation between storage subassembly, feeding conveyor subassembly, ejection of compact conveyor subassembly, the protection subassembly to can deposit the temperature of jar, pressure etc. to the acrylonitrile and carry out fine control, avoid depositing jar bad phenomena such as explosion because of reasons such as temperature or pressure lead to the acrylonitrile, eliminate the potential safety hazard.
Description
Technical Field
The utility model relates to an acrylamide preparation field, in particular to acrylonitrile storage system is used to acrylamide crystal system.
Background
Acrylamide is a white crystalline chemical substance and is a raw material for producing polyacrylamide. The polyacrylamide is mainly used in the fields of oil and gas exploitation, papermaking, water treatment, mineral washing, coating, spinning, metallurgy, cement reinforcing agents, super absorbent resin, adhesives, leather retanning agents and the like.
The existing preparation method of acrylamide comprises the following steps: raw material acrylonitrile is reacted with water by using a biological enzyme catalyst (strain chamber culture and fermentation workshop production) at the temperature of about 20 ℃ to generate an acrylamide aqueous solution, and then the acrylamide crystal product is obtained by using the procedures of refining, concentrating, crystallizing, centrifuging, drying and the like.
Acrylonitrile, which is one of raw materials for producing acrylamide crystals, is not necessarily put into use directly after being transported to the field, i.e., it is necessary to first store acrylonitrile in a storage tank or the like for use. The above storage method has certain disadvantages: because acrylonitrile is flammable, explosive and highly toxic liquid, certain requirements are required for the temperature, pressure and other parameters of acrylonitrile when the acrylonitrile is stored, and the conventional storage only adopts a common storage tank for open-air storage, so that the acrylonitrile in the storage tank is easily influenced by external factors, particularly in summer, the external temperature is high, the phenomena of temperature rise of the acrylonitrile in the storage tank, pressure rise in the tank and the like are easy to occur, the dangers of explosion and the like can exist, and the potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a storage safety's acrylonitrile storage system for acrylamide crystal preparation.
In order to solve the technical problem, the utility model adopts the technical scheme that: an acrylonitrile storage system for preparing acrylamide crystals is characterized in that: comprises that
The storage component comprises an acrylonitrile storage tank, the top end of the acrylonitrile storage tank is provided with a pressure regulating port, a nitrogen seal and a safety port, the pressure regulating port is provided with a breather valve, the safety port is provided with a safety valve, and the nitrogen seal is connected with the nitrogen seal;
the feeding conveying assembly comprises an acrylonitrile tank car, a feeding conveying pipeline and an unloading pump, wherein the acrylonitrile tank car is connected with the acrylonitrile storage tank through the feeding conveying pipeline, and the unloading pump is arranged on the feeding conveying pipeline;
the discharge conveying assembly comprises a discharge conveying channel and a conveying pump, one side of the discharge conveying channel is connected with a discharge port of the acrylonitrile storage tank, the other side of the discharge conveying channel is connected with a hydration process, and the conveying pump is arranged on the discharge conveying channel;
the tail gas treatment assembly comprises an acrylonitrile tail gas absorption tower, wherein a sampling port is arranged at the side end of the acrylonitrile tail gas absorption tower, and a sampling valve is arranged at the sampling port;
a protection subassembly, the protection subassembly includes nitrogen gas supply pipe, running water feed pipe, spray the mouth, be connected with first branch pipe, second branch pipe, third branch pipe, fourth branch pipe on the nitrogen gas supply pipe, the export of first branch pipe is inserted acrylonitrile tail gas absorption tower, and the export of second branch pipe is inserted the nitrogen and is sealed the valve, and the export of third branch pipe is inserted feed pipe, and the export of fourth branch pipe is inserted ejection of compact pipeline, be connected with fifth branch pipe, sixth branch pipe, seventh branch pipe, eighth branch pipe on the running water feed pipe, the export of fifth branch pipe is inserted acrylonitrile tail gas absorption tower, and the export of seventh branch pipe is inserted the pump of unloading, and the export of eighth branch pipe is inserted the delivery pump, spray the mouth has the several, and the equipartition is in the top that the jar was deposited to the acrylonitrile, and all spray the mouth all are linked together with sixth branch pipe.
Furthermore, still be provided with first level gauge on the jar is deposited to the acrylonitrile, be provided with the second level gauge on acrylonitrile tail gas absorption tower.
Furthermore, the outer wall of the circumference of the acrylonitrile storage tank is coated with a sun-proof heat insulation coating layer.
Further, still be provided with the circulating line on the acrylonitrile tail gas absorption tower, be provided with a recycled water circulating pump on the circulating line, the import of circulating line links to each other with the tail end of acrylonitrile tail gas absorption tower, and the export is inserted the recycled water circulating pump, has ninth branch pipe, tenth branch pipe at the exit linkage of recycled water circulating pump, and the opposite side of ninth branch pipe links to each other with the upper end of acrylonitrile tail gas absorption tower, and ejection of compact transfer passage is inserted to the opposite side of tenth branch pipe.
The utility model has the advantages that: the utility model provides a storage system, adopt storage assembly, feed delivery subassembly, ejection of compact conveying subassembly, cooperation between the protection subassembly, thereby can deposit the temperature of jar to the acrylonitrile, pressure etc. carry out fine control, avoid depositing bad phenomena such as the jar appears exploding because of reasons such as temperature or pressure lead to the acrylonitrile, eliminate the potential safety hazard, the tail gas treatment subassembly that recombines in addition, thereby retrieve the acrylonitrile tail gas that produces in the preparation process, and cooperate with the protection subassembly, save space, reduce the quantity of pipeline, realize the processing to acrylonitrile tail gas, reduce the pollution to the environment.
The design to first level gauge, second level gauge to can deposit the liquid level in jar, the acrylonitrile tail gas absorption tower to the acrylonitrile and measure, ensure that the acrylonitrile deposits the content of the liquid in jar, the acrylonitrile tail gas absorption tower.
Through depositing the sun-proof thermal-insulated dope layer of coating on the outer wall of jar at acrylonitrile to reduce external sunshine and deposit the shining of jar to acrylonitrile, slow down the rise of jar temperature is deposited to acrylonitrile when summer.
Through the cooperation of circulating line, recovery water circulating pump, ninth branch pipe, tenth branch pipe to can deposit jar with acrylonitrile tail gas absorption tower and acrylonitrile and cooperate, carry out cyclic utilization with the acrylonitrile after the recovery processing, carry out the feed to subsequent hydration process jointly, reduction in production cost.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of a system for storing acrylonitrile for preparing acrylamide crystals according to the present invention.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
An acrylonitrile storage system for preparing acrylamide crystal shown in figure 1 comprises
A storage component, storage component include that an acrylonitrile deposits jar 1, deposit jar 1 top at the acrylonitrile and be provided with pressure regulating mouth, nitrogen seal, safety vent, locate to install breather valve 12 at pressure regulating mouth, locate to install relief valve 11 at the safety vent, seal the department at nitrogen and be connected with nitrogen and seal valve 13.
The outer wall of the circumference of the acrylonitrile storage tank 1 is also coated with a sun-proof heat insulation coating layer. Through depositing the sun-proof thermal-insulated dope layer of coating on jar 1's outer wall at acrylonitrile to reduce external sunshine and deposit jar 1's irradiation to acrylonitrile, slow down the increase of jar 1 temperature is deposited to acrylonitrile when summer.
The acrylonitrile storage tank 1 is also provided with a first liquid level meter 14. As for the first liquid level meter 14, the liquid level in the acrylonitrile storage tank 1 can be measured, the content of the acrylonitrile solution in the acrylonitrile storage tank 1 is ensured, and the situation that the acrylonitrile solution overflows due to excessive amount or cannot be supplied to a subsequent hydration process due to insufficient amount is avoided.
A feeding conveying assembly, feeding conveying assembly includes the acrylonitrile tank car, feeding pipeline 2, the pump 21 of unloading, the acrylonitrile tank car is through feeding pipeline 2 and acrylonitrile deposit the feed inlet that jar 1 links to each other, the pump 21 of unloading sets up on feeding pipeline 2, lie in on feeding pipeline 2 one section between pump 21 of unloading and the acrylonitrile tank car and be provided with the first valve that distributes side by side, the eighth valve, lie in on feeding pipeline 2 that one section between pump 21 of unloading and the acrylonitrile deposit jar 1 and be provided with the second valve.
A discharge conveying assembly, discharge conveying assembly includes discharge conveying channel 3, delivery pump 31, discharge conveying channel 3's one side links to each other with the discharge gate that the acrylonitrile deposited jar 1, the hydration process is inserted to discharge conveying channel 3's opposite side, delivery pump 31 sets up 3 on discharge conveying channel, it deposits jar 1 and delivery pump 31 between one section and is provided with the third valve to lie in the acrylonitrile on discharge conveying channel 3, lie in on discharge conveying channel 3 and be provided with the fourth valve that distributes side by side on one section between delivery pump 31 and the hydration process, the ninth valve, the tenth valve, still be connected with a backflow pipeline 32 on discharge conveying channel 3, this backflow pipeline 32's import is located between fourth valve and the ninth valve, backflow pipeline 32's export access acrylonitrile deposits jar 1, the eleventh valve is still installed in backflow pipeline 32's exit.
A tail gas processing component, the tail gas processing component includes an acrylonitrile tail gas absorption tower 4, has a sample connection at the side of acrylonitrile tail gas absorption tower 4, installs a sample valve 41 in sample connection department.
The acrylonitrile off-gas absorption tower 4 is provided with a second liquid level meter 42. The second liquid level meter 42 is designed so that the liquid level in the acrylonitrile off-gas absorption tower 4 can be measured, and the content of the liquid in the acrylonitrile off-gas absorption tower 4 can be ensured.
Still be provided with circulating line 43 on acrylonitrile tail gas absorption tower 4, be provided with recovered water circulating pump 44 on circulating line 43, the import of circulating line 43 links to each other with the tail end of acrylonitrile tail gas absorption tower 4, the export of circulating line 43 inserts recovered water circulating pump 44, install the fifth valve on circulating line 43, be connected with ninth branch pipe 45 at the export of recovered water circulating pump 44, tenth branch pipe 46, the opposite side of ninth branch pipe 45 links to each other with the upside end of acrylonitrile tail gas absorption tower 4, still install the sixth valve on ninth branch pipe 45, the opposite side of tenth branch pipe 46 inserts ejection of compact transfer passage 3, still install the seventh valve on tenth branch pipe 46. Through the cooperation of circulating line 43, recovery water circulating pump 44, ninth branch pipe 45, tenth branch pipe 46 to can deposit jar 1 with acrylonitrile tail gas absorption tower 4 and acrylonitrile and cooperate, carry out cyclic utilization with the acrylonitrile after the recovery processing, supply reduction in production cost to subsequent hydration process jointly.
A protection component, which comprises a nitrogen gas supply pipe 5, a tap water supply pipe 6 and a spray nozzle 8.
The nitrogen gas supply pipe 5 is connected with a first branch pipe 51, a second branch pipe 52, a third branch pipe 53 and a fourth branch pipe 54, the outlet of the first branch pipe 51 is connected with the acrylonitrile tail gas absorption tower, the first branch pipe 51 is provided with a first pressure type automatic regulating valve and a second pressure type automatic regulating valve which are distributed in parallel, the inlet of the second branch pipe 52 is connected with the first branch pipe 51 and connected between the first pressure type automatic regulating valve and the second pressure type automatic regulating valve, the outlet of the second branch pipe 52 is connected with a nitrogen seal valve, the outlet of the third branch pipe 53 is connected with the feeding conveying pipeline 2 and located between the first valve and the eighth valve, and the outlet of the fourth branch pipe 54 is connected with the discharging conveying pipeline 3 and located between the ninth valve and the tenth valve.
The tap water supply pipe 6 is connected with a fifth branch pipe 61, a sixth branch pipe 62, a seventh branch pipe 63 and an eighth branch pipe 64, the outlet of the fifth branch pipe 61 is connected with the acrylonitrile tail gas absorption tower 4, the outlet of the fifth branch pipe 61 is provided with a twelfth valve, the outlet of the seventh branch pipe 63 is connected with the unloading pump 21, the outlet of the seventh branch pipe 63 is also provided with a thirteenth valve, the outlet of the eighth branch pipe 64 is connected with the delivery pump 31, and the outlet of the eighth branch pipe 64 is also provided with a fourteenth valve.
The spray nozzles 8 are uniformly distributed above the acrylonitrile storage tank 1, and all the spray nozzles 8 are communicated with the sixth branch pipe 62.
The working principle is as follows: when carrying out the stockpile, all open first valve, eighth valve, the second valve, all other valves are closed, then utilize feeding pipeline 2, the pump 21 of unloading is joined in marriage and is deposited jar 1 with the acrylonitrile pump sending to the acrylonitrile in the acrylonitrile tank car, in the in-process of carrying out the storage, deposit the memory space of the acrylonitrile in jar 1 through first level gauge 14 and detect, after the memory space that first level gauge 14 detected the acrylonitrile in jar 1 reaches the requirement, stop the feed, at this moment, open first pressure type automatically regulated valve, nitrogen seal valve 13, close all other valves, deposit jar 1 from nitrogen gas supply pipe 5 to acrylonitrile with nitrogen gas, realize nitrogen seal.
The in-process that the acrylonitrile kept in the jar 1 is deposited to the acrylonitrile, deposit the pressure in jar 1 by breather valve 12 to the acrylonitrile and carry out autonomic regulation, avoid the acrylonitrile to deposit the pressure in jar 1 too big, and lead to the explosion.
When ambient temperature is higher, open spray nozzle 8, through the cooperation of running water feed pipe 6, sixth branch pipe 62 to spray water cooling on depositing jar 1's outer wall to the acrylonitrile in spray nozzle 8, avoid the acrylonitrile to deposit jar 1's high temperature, and lead to the explosion phenomenon to appear.
When the material is supplied for the hydration reaction, the third valve, the fourth valve, the ninth valve and the tenth valve are opened, the delivery pump 31 works to pump the acrylonitrile solution in the acrylonitrile storage tank 1 to the hydration process through the discharge delivery pipeline 3, the content of the acrylonitrile solution in the acrylonitrile storage tank 1 is detected by the first liquid level meter 14 on the way of the material supply of the acrylonitrile storage tank 1, and when the content of the acrylonitrile solution is detected to be lower than a set value, the first valve, the eighth valve and the second valve are opened to supply the material to the acrylonitrile storage tank 1.
After the hydration reaction is supplied or the acrylonitrile is added into the acrylonitrile storage tank 1 for a certain time, the conveying of the acrylonitrile needs to be stopped, then the tenth valve is closed, the other valves are opened, nitrogen is introduced into each pipeline through the nitrogen gas supply pipe 5, and the pipelines are purged by the nitrogen.
Acrylonitrile tail gas generated in the preparation process of acrylamide is recovered by an acrylonitrile tail gas absorption tower 4, then a twelfth valve is opened, tap water is introduced into the acrylonitrile tail gas absorption tower 4 through a tap water supply pipe 6 to absorb the acrylonitrile tail gas to form acrylonitrile solution, a fifth valve and a seventh valve are opened, a recovery water circulating pump 44 works to circulate the solution in the acrylonitrile tail gas absorption tower 4 to recover the acrylonitrile tail gas in the acrylonitrile tail gas absorption tower 4, after recovery treatment is carried out for a certain time, a sampling valve 41 is opened to sample the acrylonitrile solution in the acrylonitrile tail gas absorption tower 4 from a sampling port, when the acrylonitrile solution in the acrylonitrile tail gas absorption tower 4 meets the requirement of recycling, a sixth valve is opened to pump the acrylonitrile solution in the acrylonitrile tail gas absorption tower 4 to a discharge conveying channel 3, and enters the hydration process along with the outfeed conveyor channel 3.
The utility model provides a storage system, adopt storage assembly, feed delivery subassembly, ejection of compact conveying subassembly, cooperation between the protection subassembly, thereby can deposit the temperature of jar to the acrylonitrile, pressure etc. carry out fine control, avoid depositing bad phenomena such as the jar appears exploding because of reasons such as temperature or pressure lead to the acrylonitrile, eliminate the potential safety hazard, the tail gas treatment subassembly that recombines in addition, thereby retrieve the acrylonitrile tail gas that produces in the preparation process, and cooperate with the protection subassembly, save space, reduce the quantity of pipeline, realize the processing to acrylonitrile tail gas, reduce the pollution to the environment.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. An acrylonitrile storage system for preparing acrylamide crystals is characterized in that: comprises that
The storage component comprises an acrylonitrile storage tank, the top end of the acrylonitrile storage tank is provided with a pressure regulating port, a nitrogen seal and a safety port, the pressure regulating port is provided with a breather valve, the safety port is provided with a safety valve, and the nitrogen seal is connected with the nitrogen seal;
the feeding conveying assembly comprises an acrylonitrile tank car, a feeding conveying pipeline and an unloading pump, wherein the acrylonitrile tank car is connected with the acrylonitrile storage tank through the feeding conveying pipeline, and the unloading pump is arranged on the feeding conveying pipeline;
the discharge conveying assembly comprises a discharge conveying channel and a conveying pump, one side of the discharge conveying channel is connected with a discharge port of the acrylonitrile storage tank, the other side of the discharge conveying channel is connected with a hydration process, and the conveying pump is arranged on the discharge conveying channel;
the tail gas treatment assembly comprises an acrylonitrile tail gas absorption tower, wherein a sampling port is arranged at the side end of the acrylonitrile tail gas absorption tower, and a sampling valve is arranged at the sampling port;
a protection subassembly, the protection subassembly includes nitrogen gas supply pipe, running water feed pipe, spray the mouth, be connected with first branch pipe, second branch pipe, third branch pipe, fourth branch pipe on the nitrogen gas supply pipe, the export of first branch pipe is inserted acrylonitrile tail gas absorption tower, and the export of second branch pipe is inserted the nitrogen and is sealed the valve, and the export of third branch pipe is inserted feed pipe, and the export of fourth branch pipe is inserted ejection of compact pipeline, be connected with fifth branch pipe, sixth branch pipe, seventh branch pipe, eighth branch pipe on the running water feed pipe, the export of fifth branch pipe is inserted acrylonitrile tail gas absorption tower, and the export of seventh branch pipe is inserted the pump of unloading, and the export of eighth branch pipe is inserted the delivery pump, spray the mouth has the several, and the equipartition is in the top that the jar was deposited to the acrylonitrile, and all spray the mouth all are linked together with sixth branch pipe.
2. The acrylonitrile storage system for acrylamide crystal production according to claim 1, wherein: still be provided with first level gauge on the jar is deposited to the acrylonitrile, be provided with the second level gauge on acrylonitrile tail gas absorption tower.
3. The acrylonitrile storage system for acrylamide crystal production according to claim 1, wherein: and a sun-proof heat-insulation coating layer is coated on the circumferential outer wall of the acrylonitrile storage tank.
4. The acrylonitrile storage system for acrylamide crystal production according to claim 1, wherein: still be provided with circulation pipeline on the acrylonitrile tail gas absorption tower, be provided with a recovery water circulating pump on circulation pipeline, circulation pipeline's import links to each other with the tail end of acrylonitrile tail gas absorption tower, and the export inserts the recovery water circulating pump, has ninth branch pipe, tenth branch pipe at the exit linkage of recovery water circulating pump, and the opposite side of ninth branch pipe links to each other with the upper end of acrylonitrile tail gas absorption tower, and ejection of compact transfer passage is inserted to the opposite side of tenth branch pipe.
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| CN201922280017.8U CN211443564U (en) | 2019-12-18 | 2019-12-18 | Acrylonitrile storage system for preparing acrylamide crystal |
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| CN201922280017.8U CN211443564U (en) | 2019-12-18 | 2019-12-18 | Acrylonitrile storage system for preparing acrylamide crystal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261644A (en) * | 2021-12-31 | 2022-04-01 | 福州江阴建滔化工码头有限公司 | Port crude MDI storage and transportation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114261644A (en) * | 2021-12-31 | 2022-04-01 | 福州江阴建滔化工码头有限公司 | Port crude MDI storage and transportation system and method |
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