CN112076694B - Safe unloading method and application thereof - Google Patents
Safe unloading method and application thereof Download PDFInfo
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- CN112076694B CN112076694B CN201910506872.8A CN201910506872A CN112076694B CN 112076694 B CN112076694 B CN 112076694B CN 201910506872 A CN201910506872 A CN 201910506872A CN 112076694 B CN112076694 B CN 112076694B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000012071 phase Substances 0.000 claims abstract description 372
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011344 liquid material Substances 0.000 claims abstract description 32
- 239000002253 acid Substances 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000012074 organic phase Substances 0.000 claims abstract description 18
- 238000005804 alkylation reaction Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 62
- 239000000463 material Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 22
- 239000012295 chemical reaction liquid Substances 0.000 claims description 19
- 230000017525 heat dissipation Effects 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 13
- 235000011149 sulphuric acid Nutrition 0.000 claims description 4
- 239000001117 sulphuric acid Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 4
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 8
- 238000010406 interfacial reaction Methods 0.000 description 6
- 230000000717 retained effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 239000001282 iso-butane Substances 0.000 description 4
- 238000007086 side reaction Methods 0.000 description 3
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910000856 hastalloy Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- FLTJDUOFAQWHDF-UHFFFAOYSA-N trimethyl pentane Natural products CCCCC(C)(C)C FLTJDUOFAQWHDF-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
-
- 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
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/005—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the outlet side being of particular interest
Abstract
The invention relates to the field of emergency disposal of chemical accidents, and discloses a safe discharging method of a two-phase mixed liquid material and application thereof. The two-phase mixed liquid material comprises a first phase and a second phase which are not miscible, and the density of the first phase is greater than that of the second phase, and the safe discharge method comprises the following steps: a first overflow step: injecting the two-phase mixed liquid material into the first phase area, and overflowing the second phase and at least part of the first phase in the first phase area to the mixed phase area; a second overflow step: overflowing at least a portion of the second phase in the mixed phase zone to the second phase zone. The safe discharge method is particularly suitable for separating the acid phase and the organic phase in the sulfuric acid alkylation process, can quickly separate the two phases and reduce the two-phase reaction. The safe discharge method is particularly suitable for separating the acid phase and the organic phase in the sulfuric acid alkylation process, can quickly separate the two phases and reduce the two-phase reaction.
Description
Technical Field
The invention relates to the field of chemical accident emergency disposal, in particular to a safe unloading method and application thereof, and particularly relates to a safe unloading method suitable for separation of an acid phase and an organic phase in a sulfuric acid alkylation process and application thereof.
Background
The sulfuric acid alkylation process is an ideal process for producing high-octane gasoline, and the high-octane gasoline which takes trimethylpentane as a main component is generated by reacting butene and isobutane through concentrated sulfuric acid serving as a catalyst. The acid to hydrocarbon volume ratio is about 1:1.5, and because of the poor compatibility of the acid phase with the hydrocarbon phase, it is necessary to mix the two phases by stirring or static mixers to allow interfacial reactions to occur.
Firstly, due to the strong oxidizing property of concentrated sulfuric acid, the effect of mass and heat transfer is very critical in the process, if process fluctuation occurs, a large number of side reactions occur, so that a large number of abnormal heat release is caused, and the reaction of the whole reaction system is possibly out of control; secondly, along with the separation process goes on, the concentration of sulphuric acid reduces gradually, and its corrosivity aggravation can cause equipment corrosion and even leak to further cause problems such as material run-off and damage, personnel's injury and environmental pollution. Therefore, it is necessary to develop a corresponding safety technology to avoid accidents.
The key equipment of the sulfuric acid alkylation process is a reactor, when corrosion leakage of the reactor cannot be controlled, a reaction system needs to be quickly removed and stored in a storage tank, and the mixing effect of an acid hydrocarbon phase is reduced in the transfer storage process, so that the heat transfer effect is reduced, the concentration of certain substances at the interface of two phases is increased, the problems of side reaction increase, local overheating and the like are caused, and the reaction of the whole system is out of control. At present, no better separation device and method for two-phase mixed reaction liquid materials exist in the prior art.
Disclosure of Invention
The object of the present invention is to overcome the above problems of the prior art and to provide a safe discharge method and its application, which is particularly suitable for the separation of the acid phase from the organic phase in a sulfuric acid alkylation process, which can separate the two phases rapidly and reduce the progress of the two-phase reaction.
In order to achieve the above object, in one aspect, the present invention provides a method for safely discharging a two-phase mixed liquid material, the two-phase mixed liquid material including a first phase and a second phase which are immiscible, and the first phase having a density greater than that of the second phase, the method comprising:
a first overflow step: injecting the two-phase mixed liquid material into the first phase area, and overflowing the second phase and at least part of the first phase in the first phase area to the mixed phase area;
a second overflow step: overflowing at least a portion of the second phase in the mixed phase zone to a second phase zone;
after the first overflow step and the second overflow step, the first phase zone contains only the first phase, the second phase zone contains only the second phase, and the mixed phase zone contains the first phase and the second phase.
Preferably, the two-phase mixed liquid material is a reaction liquid material in a sulfuric acid alkylation process.
Preferably, when the two-phase mixed liquid material comprises a first phase and a second phase and the density of the first phase is greater than that of the second phase, the volume of the first phase region is 70-95% of the volume of the first phase, the volume of the mixed phase region is the sum of 5-30% of the volume of the first phase and 5-30% of the volume of the second phase, and the volume of the second phase region is more than 70% of the volume of the second phase.
More preferably, when the two-phase mixed liquid comprises a first phase and a second phase and the density of the first phase is greater than that of the second phase, the volume of the first phase region is 90-95% of the volume of the first phase, the volume of the mixed phase region is the sum of 5-10% of the volume of the first phase and 5-10% of the volume of the second phase, and the volume of the second phase region is more than 90% of the volume of the second phase.
Preferably, the method is performed using a secure discharge tank comprising a tank body; the inner space of the tank body is sequentially divided into a first phase area, a mixed phase area and a second phase area, wherein the upper parts of the first phase area, the mixed phase area and the second phase area are communicated; the first separation baffle is higher than the second separation baffle, the liquid in the first phase region can overflow to the mixed phase region, and the liquid in the mixed phase region can overflow to the second phase region; and a material returning inlet is arranged at the upper part of the first phase area.
Preferably, the method for safe discharge further comprises the following steps: and a heat dissipation part is arranged in the mixed phase region and used for leading out heat generated by the interfacial reaction of the two-phase mixed liquid material.
Preferably, an interface floater is further provided inside the mixed phase region, and the heat dissipation member is positioned at the two-phase interface of the mixed phase region by the interface floater.
Preferably, the heat radiating member is provided in a structure capable of conducting heat to both upper and lower portions of the mixed phase region.
Preferably, the heat dissipation part is a metal heat conduction net or a heat taking coil.
Preferably, the mesh side length of the metal heat conduction net is 5-10% of the height of the first phase of the mixed phase region.
Preferably, the primary separation baffle and the secondary separation baffle are movably disposed inside the tank body.
In a second aspect the present invention provides the use of the above-described safe discharge process of the present invention in the separation of the acid phase from the organic phase of a sulphuric acid alkylation process.
Through the technical scheme, the safe unloading method has the following advantages:
first, the method of the present invention can collect the reaction materials and store them in a safe discharge tank for a long time, and can separate the main bodies of the acid and hydrocarbon phases, avoiding the risk of the overall thermal runaway of the system.
Secondly, the method of the present invention can set the standing residence time according to the time for the two phases to stand from the optimum mixed state to the two-phase separated state.
Thirdly, for the acid hydrocarbon part at the interface which can not be separated, a heat dissipation part is arranged, so that the heat of local residual reaction or side reaction is quickly and uniformly conducted, and the heat accumulation is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the safety discharge tank for a sulfuric acid alkylation process of the present invention.
Description of the reference numerals
1. Material return inlet 2, first phase
3. Second phase after primary separation 4, first phase after primary separation
5. Second phase 6 after secondary separation, primary separation baffle
7. Secondary separation baffle 8 and heat dissipation component
9. Interface float 10, two-phase interface
11. First phase zone 12, mixed phase zone
13. Second phase zone 14, can body
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, each range between its endpoints and individual point values, and each individual point value can be combined with each other to give one or more new numerical ranges, and such numerical ranges should be construed as specifically disclosed herein.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right in the drawings, unless otherwise specified; "inner and outer" refer to the inner and outer portions of the can body of the drawings.
The invention provides a safe discharging method of a two-phase mixed liquid material, which comprises the following steps:
a first overflow step: injecting the two-phase mixed liquid material into the first phase area, and overflowing the second phase and at least part of the first phase in the first phase area to the mixed phase area;
a second overflow step: overflowing at least a portion of the second phase in the mixed phase zone to a second phase zone;
after the first overflow step and the second overflow step, the first phase zone contains only the first phase, the second phase zone contains only the second phase, and the mixed phase zone contains the first phase and the second phase.
Preferably, the two-phase mixed liquid material is a reaction liquid material in a sulfuric acid alkylation process.
The invention is preferably carried out using a secure discharge tank as shown in fig. 1, which includes a tank body 14; a primary separation baffle 6 and a secondary separation baffle 7 are arranged at the lower part in the tank body 14, so that the internal space of the tank body 14 is sequentially divided into a first phase zone 11, a mixed phase zone 12 and a second phase zone 13, the upper parts of which are communicated; the primary separation baffle 6 is higher than the secondary separation baffle 7 so that the liquid in the first phase zone 11 can overflow to the mixed phase zone 12 and the liquid in the mixed phase zone 12 can overflow to the second phase zone 13; a material return inlet 1 is arranged at the upper part of the first phase zone 11.
In the safe discharge tank of the invention, a first phase zone 11, a primary separation baffle 6, a mixed phase zone 12, a secondary separation baffle 7 and a second phase zone 13 are arranged in the tank body 14 in sequence. By setting the primary separation baffle 6 higher than the secondary separation baffle 7, the liquid level in the first phase zone 11 can be made higher than the liquid level in the mixed phase zone 12 during the overflow of the liquid from the first phase zone 11 to the mixed phase zone 12, and the liquid level in the mixed phase zone 12 can be made higher than the liquid level in the second phase zone 13 during the overflow of the liquid from the mixed phase zone 12 to the second phase zone 13, whereby the two phases can be separated efficiently.
In the safety discharge tank of the present invention, the material returning inlet 1 is used for injecting the two-phase mixed liquid material into the tank body 14.
The two-phase mixed liquid material which can be separated by the safe discharge tank of the invention can be a mixed liquid of two phases which have different densities and are immiscible, for example, an aqueous phase and an organic phase, an organic phase and an acid phase (such as sulfuric acid and the like), and the two phases can also react with each other, so long as the effect of layering the two phases can be achieved, and the safe discharge tank of the invention can be used for separation.
By arranging the mixed phase region 12, a sufficient buffer space can be provided between the two phases of liquid, the two phases can be fully separated without being accurately separated, the separation efficiency is improved, and the improvement of the purity of the two phases respectively obtained in the first phase region 11 and the second phase region 13 is facilitated. That is, by maintaining the two-phase interface 10 in the mixed phase region 12, most two phases can be obtained in the first phase region 11 and the second phase region 13 respectively without standing for a long time, so that the mutual contact between the two phases is rapidly reduced, and the purpose of rapid and efficient separation is achieved. For convenience of description, the denser of the two phases is also referred to as the first phase, and the less dense phase is referred to as the second phase.
According to the present invention, in order to sufficiently separate two phases in a two-phase mixed liquid material, it is necessary to appropriately set the volumes of the first phase zone 11, the mixed phase zone 12, and the second phase zone 13. Preferably, the volume of the first phase region 11 is 70-95% of the volume of the first phase, the volume of the mixed phase region 12 is the sum of 5-30% of the volume of the first phase and 5-30% of the volume of the second phase, and the volume of the second phase region 13 is 70% or more of the volume of the second phase. More preferably, the volume of the first phase zone 11 is 90-95% of the volume of the first phase, the volume of the mixed phase zone 12 is the sum of 5-10% of the volume of the first phase and 5-10% of the volume of the second phase, and the volume of the second phase zone 13 is 90% or more of the volume of the second phase.
By arranging the volumes of the first phase zone 11, the mixed phase zone 12 and the second phase zone 13 as described above, a substantial portion of the first phase can be retained in said first phase zone 11, while a substantial portion of the second phase overflows into the second phase zone 13, thereby achieving a rapid separation of the two phases. Specifically, it is preferable that 70 to 95% or more (more preferably 90 to 95%) of the first phase be retained in the first phase zone 11 and 70 to 95% or more (more preferably 90 to 95%) of the second phase be made to overflow to the second phase zone 13.
In order to facilitate control of the volumes of the first phase zone 11, the mixed phase zone 12 and the second phase zone 13 described above, it is preferable that the primary separating baffle 6 and the secondary separating baffle 7 be movably disposed inside the tank 14. The movable arrangement means that the positions of the primary separation baffle 6 and the secondary separation baffle 7 arranged in the tank 14 can be changed, so that the volumes of the first phase zone 11, the mixed phase zone 12 and the second phase zone 13 can be properly adjusted according to the respective volumes of two phases in the two-phase mixed liquid material, and the separation effect is ensured. As a specific mode of the movable setting, as long as the volumes of the three phase regions can be ensured without leakage of liquid, for example, different mounting positions (a card slot or the like) or a slide setting or the like may be set.
In the present invention, in order to rapidly release heat in the two-phase reaction, preferably, the method for discharging the material safely further comprises: the heat dissipation member 8 is disposed inside the mixed phase region 12, and the heat dissipation member 8 is used for conducting heat generated by an interfacial reaction of the two-phase mixed liquid material out.
According to the present invention, in order to accelerate heat conduction, it is preferable that the heat radiating member 8 is provided in a structure capable of conducting heat to both upper and lower portions of the mixed phase region 12. The specific structure of the heat dissipation member 8 is not particularly limited, and heat can be transferred. For example, the heat dissipation member 8 may be a metal heat conduction mesh, more preferably a three-dimensional metal heat conduction mesh, or may be a heat extraction coil. The material used for the heat dissipation member 8 may be hastelloy, for example.
According to the present invention, it is preferable that an interface float 9 is further provided inside the mixed phase region 12, and the heat radiating member 8 is positioned at the two-phase interface 10 of the mixed phase region 12 through the interface float 9. By arranging the interface floater, the position of the heat dissipation part 8 can be controlled, and heat generated by interface reaction can be led out as soon as possible. To ensure that the interface float is positioned at the two-phase interface 10 of the mixed-phase region 12, it is desirable to have the interface float have a density less than the first phase and greater than the second phase, more preferably close to the average density of the first and second phases.
According to a preferred embodiment of the present invention, in order to ensure better heat dissipation of the interfacial reaction, the mesh side length of the metal heat conducting mesh is preferably 5 to 10%, more preferably 7 to 8%, of the first phase height of the mixed phase region 12. The metal heat conducting mesh may for example form a grid of squares, rectangles, circles, etc. In the invention, the mesh side length of the metal heat conduction net refers to the mesh size of the metal heat conduction net, and is the side length of a square in the case of a square mesh. The metal heat-conducting net can be better contacted with two phases, so that the heat of interface reaction is led out, and the influence on the separation process of the two phases can be reduced as much as possible.
In the invention, the separation process of the two phases and the process of introducing the two-phase mixed liquid material into the safe discharge tank are carried out simultaneously, the two phases are immediately layered after being introduced into the safe discharge tank, and the liquid on the upper layer begins to overflow along with the rise of the liquid level. In the present invention, the introduction speed of the two-phase mixed liquid is not particularly limited, and is preferably determined according to the time t from the two-phase standing from the optimum mixed state to the two-phase separation state, that is, the time for introducing the whole two-phase mixed liquid is preferably longer than t, more preferably 1.1t to 3t, and still more preferably 1.1t to 1.5 t. By setting the introduction speed of the two-phase mixed liquid material as described above, sufficient separation of the two phases in the two-phase mixed liquid material can be ensured.
Specifically, under laboratory conditions, a mixed solution is prepared by using the same two-phase mixed liquid material according to the proportion of different liquid materials during reaction feeding, the two-phase mixed liquid material is mechanically stirred to be uniformly mixed, then stirring is stopped and timing is started until the gradual separation degree of the two-phase mixed liquid material reaches 90% of the total volume (namely the volume of a part of completely separated two phases is 90% of the total volume of the mixed liquid material), and the time period is t.
Fig. 1 shows a state after separation is completed (for a clearer explanation, fig. 1 does not consider the volume relationship among the first phase region 11, the mixed phase region 12, and the second phase region 13), the first phase region 11 contains most of the first phase 2, the second phase region 13 contains most of the second phase 5 after secondary separation, the mixed phase region 12 contains only a small amount of the first phase 4 after primary separation and the second phase 3 after primary separation, and a heat dissipation member is located near the two-phase interface 10 at the two-phase interface 10 between the first phase 4 after primary separation and the second phase 3 after primary separation by providing an appropriate interface float 9, so that heat generated by the interface reaction is accelerated to be transferred to the first phase 4 after primary separation and the second phase 3 after primary separation. The first separation is referred to as a first overflow, and the second separation is referred to as a second overflow.
In a second aspect the present invention provides the use of the above-described safe discharge process of the present invention for the separation of the acid phase from the organic phase of a sulphuric acid alkylation process.
In the reactor of the sulfuric acid alkylation process, concentrated sulfuric acid is used as a catalyst to react butene with isobutane, an acid phase (as a first phase) and an organic phase (as a second phase) exist in a reaction liquid material, and the two phases need to be mixed to perform an interfacial reaction. When the reactor is out of control due to corrosion leakage and the like, the reaction liquid needs to be quickly removed from the reactor, and meanwhile, the two phases are expected to be separated as soon as possible, the reaction is stopped, and the occurrence of dangerous conditions is reduced. By using the safe discharge tank of the invention, the above purpose can be quickly realized.
The present invention will be described in detail below by way of examples.
Example 1
The separation of the acid phase from the organic phase in the reaction stream of a sulfuric acid alkylation process was carried out using a safety dump tank as shown in figure 1.
The reaction liquid contains sulfuric acid and organic substances such as butene, isobutane, trimethylpentane generated by the reaction of butene and isobutane, wherein the sulfuric acid is immiscible with other organic components and has a higher density than the other organic components, so that the sulfuric acid is taken as a first phase (also called as an acid phase) and the other organic components are taken as a second phase (also called as an organic phase) in the reaction liquid.
The secure discharge tank includes a tank body 14. A primary separation baffle 6 and a secondary separation baffle 7 are arranged at the lower part of the interior of the tank body 14, so that the interior space of the tank body 14 is sequentially divided into a first phase zone 11, a mixed phase zone 12 and a second phase zone 13, the upper parts of which are communicated with each other; the primary separation baffle 6 is higher than the secondary separation baffle 7, the liquid in the first phase zone 11 can overflow to the mixed phase zone 12, and the liquid in the mixed phase zone 12 can overflow to the second phase zone 13; a material return inlet 1 is arranged at the upper part of the first phase zone 11.
The volumes of the first phase zone 11, the mixed phase zone 12 and the second phase zone 13 are set according to the volumes of two phases in the reaction liquid material, the volume of the first phase zone 11 is 95% of the volume of the first phase in the reaction liquid material, the volume of the mixed phase zone 12 is the sum of 5% of the volume of the first phase in the reaction liquid material and 5% of the volume of the second phase, and the volume of the second phase zone 13 is 95% of the volume of the second phase in the reaction liquid material.
The heat dissipation member 8 is disposed inside the mixed phase region 12, and the heat dissipation member 8 is used for conducting heat generated by an interfacial reaction of the two-phase mixed liquid material out. The heat dissipation component 8 is a three-dimensional metal heat conduction net (composed of cubic meshes) made of hastelloy, and the side length of each cubic mesh is 8% of the height of the first phase of the mixed phase region 12. An interface float 9 is also provided inside the mixed phase region 12, the interface float 9 positioning the heat radiating member 8 at the two-phase interface 10 of the mixed phase region 12, the density of the interface float 9 being the average of the densities of the first phase and the second phase.
During the separation process, the reaction liquid material is introduced into the safe discharge tank through the material returning inlet 1, the liquid material firstly enters the first phase zone 11 and gradually stratifies in the first phase zone 11, the acid phase at the lower part is retained in the first phase zone 11 (such as the first phase 2 in fig. 1), and the organic phase at the upper part and a small amount of the acid phase gradually overflow into the mixed phase zone 12, and as the volume of the first phase zone 11 is 95% of the volume of the acid phase in the reaction liquid material, the vast majority of the acid phase can be ensured to be retained in the first phase zone 11.
The reaction liquid material overflowing into the mixed phase zone 12 is also gradually layered therein (i.e., the first phase 4 after the first separation and the second phase 3 after the first separation in fig. 1), the acid phase at the lower part is retained in the mixed phase zone 12, and the organic phase at the upper part gradually overflows into the second zone 12 (i.e., the second phase 5 after the second separation), since the volume of the mixed phase zone 12 is the sum of 5% of the volume of the acid phase and 5% of the volume of the organic phase in the reaction liquid material, and the volume of the second phase zone 13 is 95% of the volume of the organic phase in the reaction liquid material, it is possible to overflow most of the organic phase into the second phase zone 13.
Therefore, the reaction liquid material retained in the mixed phase zone 12 only accounts for about 5% of the volume of the acid phase and about 5% of the volume of the organic phase in the reaction liquid material, and the purpose of quickly separating the two phases is achieved.
In addition, in the whole separation process, the metal heat conduction net and the interface floater 9 can quickly disperse and transfer the heat of the two-phase interface reaction to the inside of the two phases, so that the heat conduction efficiency is accelerated, the purpose of quickly reducing the reaction progress is achieved, and the safe separation of the two phases is facilitated. The method is particularly suitable for an emergency treatment method aiming at the corrosion leakage working condition of the reactor, and avoids the problems of material leakage, environmental pollution and the like through centralized collection.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including various technical features being combined in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (9)
1. A method for safely discharging a two-phase mixed liquid material, wherein the two-phase mixed liquid material comprises a first phase and a second phase which are not miscible with each other, and the first phase has a density higher than that of the second phase, the method comprising:
a first overflow step: injecting the two-phase mixed liquid material into the first phase area, and overflowing the second phase and at least part of the first phase in the first phase area to the mixed phase area;
a second overflow step: overflowing at least a portion of the second phase in the mixed phase zone to a second phase zone;
after the first overflow step and the second overflow step, the first phase zone contains only the first phase, the second phase zone contains only the second phase, and the mixed phase zone contains the first phase and the second phase;
wherein the volume of the first phase zone is 70-95% of the volume of the first phase, the volume of the mixed phase zone is the sum of 5-30% of the volume of the first phase and 5-30% of the volume of the second phase, and the volume of the second phase zone is more than 70% of the volume of the second phase;
the safe discharging method also comprises the following steps: and a heat dissipation part and an interface floater are arranged in the mixed phase region, the heat dissipation part is used for conducting heat generated by the interface reaction of the two-phase mixed liquid material out, and the heat dissipation part is positioned at the two-phase interface of the mixed phase region through the interface floater.
2. The safe discharge method according to claim 1, wherein the two-phase mixed liquid material is a reaction liquid material in a sulfuric acid alkylation process.
3. The safe discharge method according to claim 1, wherein the volume of the first phase zone is 90 to 95% of the volume of the first phase, the volume of the mixed phase zone is the sum of 5 to 10% of the volume of the first phase and 5 to 10% of the volume of the second phase, and the volume of the second phase zone is 90% or more of the volume of the second phase.
4. The secure discharge method of claim 1, wherein the method is performed using a secure discharge tank comprising a tank body (14);
wherein, a primary separation baffle (6) and a secondary separation baffle (7) are arranged at the lower part of the interior of the tank body (14), so that the interior space of the tank body (14) is sequentially divided into a first phase region (11), a mixed phase region (12) and a second phase region (13) with the upper parts communicated;
the primary separation baffle (6) is higher than the secondary separation baffle (7) so that the liquid in the first phase zone (11) can overflow to the mixed phase zone (12) and the liquid in the mixed phase zone (12) can overflow to the second phase zone (13);
and a material returning inlet (1) is arranged at the upper part of the first phase region (11).
5. The safe discharging method according to claim 1, wherein the heat radiating member is provided in a structure capable of conducting heat to both upper and lower portions of the mixed phase zone.
6. The safe discharging method according to claim 1, wherein the heat radiating member is a metal heat conducting mesh or a heat taking coil.
7. The safe discharging method according to claim 6, wherein the mesh side length of the metal heat-conducting net is 5-10% of the first phase height of the mixed phase region.
8. A method of safe discharge according to claim 4, wherein the primary separation baffle (6) and the secondary separation baffle (7) are movably arranged inside the tank (14).
9. Use of a safe discharge method according to any one of claims 1 to 8 in the separation of the acid phase from the organic phase of a sulphuric acid alkylation process.
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| CN103635246A (en) * | 2011-01-31 | 2014-03-12 | 马来西亚国家石油公司 | An improved separator and method for separation |
| CN208193722U (en) * | 2018-04-10 | 2018-12-07 | 江西绿源油脂实业有限公司 | A kind of Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic reaction kettle tail gas recycle miscella device |
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| GB1364943A (en) * | 1971-03-17 | 1974-08-29 | United Aircraft Corp | Vortex flow system for separating a mixture of two liquids having different densities such as oil and water |
| EP1208897A1 (en) * | 2000-11-21 | 2002-05-29 | Epcon Norge AS | Combined degassing and flotation tank |
| CN102921562B (en) * | 2011-08-09 | 2015-03-11 | 苏州优耐特机械制造有限公司 | Spiral discharging centrifuge |
| CN208583021U (en) * | 2018-06-20 | 2019-03-08 | 江西思派思香料化工有限公司 | A kind of oily-water seperating equipment |
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| CN103635246A (en) * | 2011-01-31 | 2014-03-12 | 马来西亚国家石油公司 | An improved separator and method for separation |
| CN208193722U (en) * | 2018-04-10 | 2018-12-07 | 江西绿源油脂实业有限公司 | A kind of Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic reaction kettle tail gas recycle miscella device |
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