CN115253354B - Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method - Google Patents
Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method Download PDFInfo
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- CN115253354B CN115253354B CN202210879060.XA CN202210879060A CN115253354B CN 115253354 B CN115253354 B CN 115253354B CN 202210879060 A CN202210879060 A CN 202210879060A CN 115253354 B CN115253354 B CN 115253354B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/324—Tray constructions
- B01D3/326—Tray supports
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
- C11B3/14—Refining fats or fatty oils by distillation with the use of indifferent gases or vapours, e.g. steam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/06—Separation devices for industrial food processing or agriculture
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- Engineering & Computer Science (AREA)
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Abstract
A sieve plate column plate unit component, a stripping tower device and a grain and oil deep processing method relate to the technical field of grain and oil deep processing, and the technical scheme is as follows: including overflow weir subassembly, sieve tray subassembly and a plurality of board that drenches that looses, be fixed with angle steel tray supporting seat on the overflow weir subassembly, the sieve tray subassembly is fixed on angle steel tray supporting seat, a plurality of the board that drenches looses is fixed in the below of sieve tray subassembly. The beneficial effects of this technical scheme are: the characteristics of the multi-layer mutually staggered sieve plate tower plates of the sieve plate stripping section are fully utilized, the gas-liquid two phases perform better mass transfer and heat transfer processes on the sieve plate tower plates in a foam or jet contact state, a mixed oil laminar film is formed under the action of liquid collection and liquid distribution of the spray plate to perform cross stripping with the ascending mixed gas, and the heat of the mixed gas is fully utilized to strengthen the stripping effect.
Description
Technical Field
The invention relates to the technical field of grain and oil deep processing, in particular to a sieve plate column plate unit assembly, a stripping tower device and a grain and oil deep processing method.
Background
Conventional mixed oil strippers are typically layer tray strippers, the main body of the stripper consisting of multiple layers of trays, each layer of tray consisting of an upper conical distributor plate and a lower annular distributor plate. The mixed oil to be stripped enters into an overflow disc on a top disc distribution disc, the mixed oil sequentially passes through each layer of discs and falls into an oil collecting disc below a bottom disc, and crude oil is guided into a central tube of bottom direct steam by an oil guide tube and is sprayed upwards after being mixed with the direct steam, so that the re-stripping is finished.
Although the mixed oil sequentially falls into the annular distribution plate from the periphery of the conical distribution plate, then falls into the lower conical distribution plate from the inner ring of the annular distribution plate, the mixed gas at the lower part rises to the periphery of the conical distribution plate from the center of the annular distribution plate for repeated operation, but the mixed oil has short residence time in the plate, foam or jet contact state with good mass transfer cannot occur between gas phase and liquid phase, and the diffusion specific surface area is small when the bottom direct steam and crude oil are mixed and sprayed out, so the probability of mass transfer and heat transfer of the mixed gas and liquid is small, the heat utilization rate is low, the stripping effect is poor, the manufacturing difficulty is high, the scaling phenomenon of the stripping tower is serious, and the cleaning is difficult.
Disclosure of Invention
The invention aims to overcome the defects that the existing mixed oil has short residence time in a tray, and foam or jet contact state with good mass transfer cannot occur between gas phase and liquid phase, and the diffusion specific surface area is small when the bottom direct steam and crude oil are mixed and sprayed out.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a sieve tray unit subassembly, includes overflow weir subassembly, sieve tray subassembly and a plurality of board that drenches that looses, be fixed with angle steel tray supporting seat on the overflow weir subassembly, the sieve tray subassembly is fixed on angle steel tray supporting seat, a plurality of the board that drenches that looses is fixed in the below of sieve tray subassembly.
By utilizing the characteristics of the multi-layer mutually staggered sieve plate column plate assemblies of the sieve plate stripping section, the gas-liquid two phases perform better mass transfer and heat transfer processes on the sieve plate column plate assemblies in a foam or jet contact state, and a mixed oil laminar film is formed under the action of liquid collection and liquid distribution of the spray plate to perform cross stripping with the ascending mixed gas, so that the heat of the mixed gas is fully utilized to strengthen the stripping effect.
Preferably, the overflow weir assembly sequentially comprises a first overflow weir plate, a second overflow weir plate, a third overflow weir plate and a fourth overflow weir plate from bottom to top, the lower edge of the first overflow weir plate is internally provided with a guide plate, the middle part of the fourth overflow weir plate is internally provided with a first baffle plate, the lower part of the second overflow weir plate is internally provided with a second baffle plate, and the angle steel tray support seat is fixed on the third overflow weir plate.
The first deflector plate and the second deflector plate effectively prevent liquid entrained along the liquid foam of the weir assembly from rising and leading out the liquid to strip with the rising mixed gas H.
Preferably, the middle parts of the first overflow weir plate and the fourth overflow weir plate are inwards provided with a first baffle.
Preferably, the sieve plate tray assembly comprises a support frame and a sieve plate tray connecting piece, the support frame comprises a middle girdle tray and two end girdle trays, one ends of the two end girdle trays are respectively fixed at two ends of the middle girdle tray, one ends of the two end girdle trays, which are far away from the middle girdle tray, are fixed with upright posts, and two ends of the first overflow weir plate, the second overflow weir plate, the third overflow weir plate and the fourth overflow weir plate are respectively fixed on the two upright posts;
the sieve plate column plate connecting piece comprises a first sieve plate column plate, a second sieve plate column plate and a bow-shaped column plate, wherein a plurality of rows of sieve holes are formed in the first sieve plate column plate and the second sieve plate column plate, and the first sieve plate column plate is fixedly connected to the angle steel column tray supporting seat through bolts;
the middle girdle tray and the inner parts of the arc edges of the two end girdle trays are fixed with a plurality of rectangular lug seats at equal intervals, a plurality of nuts are fixed on the rectangular lug seats, a plurality of lining plates with screw holes are arranged above the rectangular lug seats, the arc edges of the first sieve plate column plate, the second sieve plate column plate and the arc column plate are all provided with fixing screw holes corresponding to the rectangular lug seats, the rectangular lug seats are respectively positioned below the rectangular lug seats by the nuts connected with the first sieve plate column plate and the arc column plate, and the nuts connected with the rectangular lug seats and the second sieve plate column plate are positioned above the rectangular lug seats.
The mixed gas H passes through each layer of sieve holes under the pushing of pressure difference, the ascending mixed gas H can influence the descending speed of the mixed oil M from the sieve holes of the sieve plate, meanwhile, the ascending resistance of the mixed gas H is increased, and due to the interaction of the mixed gas H and the sieve plate, a relatively stable liquid level thickness is formed on the sieve plate and the sieve plate assembly, so that the gas and the liquid which flow in a cross-flow mode perform mass transfer and heat transfer processes in a foam contact state or a jet contact state.
Preferably, a first spray plate and a second spray plate are fixed on the lower surface of the first sieve plate column plate, the lower edges of the first spray plate and the second spray plate are respectively provided with a folded edge, and the folded edges tilt towards opposite directions;
the lower surface of the second sieve plate column plate is provided with two third spray plates, the lower edges of the two third spray plates are respectively provided with a folded edge, and the folded edges of the two third spray plates tilt towards the long chord side;
the lower surface of the arched tower plate is fixedly provided with a fifth spray plate and a fourth spray plate, the lower edges of the fourth spray plate and the fifth spray plate are respectively provided with a folded edge, the folded edges tilt towards opposite directions, and two ends of the second sieve plate tower plate are respectively detachably connected with one ends of the first sieve plate tower plate and the arched tower plate.
And forming uniform laminar liquid films on two sides of the vertical surface of the spray plates, obliquely throwing out by utilizing the guiding effect that the lower edge of each spray plate is tilted up by 30 degrees, performing cross stripping with the ascending mixed gas H again, tilting the first spray plate and the second spray plate by 30 degrees along the opposite direction of the folded edge under the fourth spray plate and the fifth spray plate, and enabling falling liquid to be subjected to cross mixing liquid distribution on the lower sieve plate component.
The stripping tower device comprises a stripping tower cylinder body, wherein the stripping tower cylinder body comprises a sieve plate stripping section and a bottom separation chamber from top to bottom, the sieve plate stripping section comprises a plurality of sieve plate column plate unit assemblies and downcomer sealing disc assemblies, the sieve plate column plate units are arranged in the sieve plate stripping section from top to bottom at equal intervals in a left-right staggered manner, and two end ring belt trays and an intermediate ring belt tray are both fixed on the side wall in the stripping tower cylinder body.
Preferably, the downcomer sealing disc assembly comprises a sealing plate tray fixed on the inner side wall of the stripping column cylinder, sealing disc overflow weir fixing frames are fixed on two sides of the sealing plate tray, a downcomer sealing disc is fixed on a chord edge in the sealing plate tray, the downcomer sealing disc is provided with a bending edge which is arched and provided with an upward right angle of the chord edge, the bending edge is fixedly connected with the sealing disc overflow weir fixing frames, and two liquid draining holes are formed in the downcomer sealing disc close to the chord edge.
The sealing disk is ensured to have no liquid accumulation when the operation is stopped.
Preferably, the stripper column body is connected with a top separation chamber through a reducing connecting section, a vacuum gauge is arranged on one side of the upper end of the top separation chamber, a mixed gas outlet is arranged at the top of the top separation chamber, manhole doors are arranged on the side walls of the top separation chamber and the lower part of the stripper column body, a plurality of overhaul holes are arranged on the stripper column body, the overhaul holes and a plurality of groups of sieve plate column plate unit components are correspondingly arranged, a sieve plate type stripper column liquid inlet is arranged on the middle lower part of the inclined surface side wall of the reducing connecting section, a stripping pipe is connected to the sieve plate type stripper column liquid inlet, and a liquid inlet downcomer is arranged right in front of the sieve plate type stripper column liquid inlet;
the liquid inlet downcomer comprises a lower liquid baffle and an upper liquid baffle, wherein the lower liquid baffle is positioned at the upper part of the stripping section, the lower end of the upper liquid baffle is abutted to the top of the lower liquid baffle, the two ends of the upper liquid baffle are fixed on the side wall of the reducing connecting section, the middle part of the upper end of the upper liquid baffle is fixedly provided with a horizontal liquid baffle reinforcing plate, one end of the horizontal liquid baffle reinforcing plate is fixed on the reducing connecting section, the right side of the lower end of the lower liquid baffle is provided with a notch, and a cleaning and adjusting movable plate is fixed on the notch.
The cleaning and adjusting movable plate is convenient for cleaning and adjusting the height, and the mixed oil entering the liquid inlet downcomer is subjected to gas-liquid separation.
Preferably, the lower end of the stripping tube is provided with a mixed oil inlet, one side of the lower part of the stripping tube is connected with a stripping tube direct steam injection tube in a penetrating way through a sleeve, one end of the stripping tube direct steam injection tube far away from the stripping tube is provided with a stripping tube direct steam inlet, the stripping tube direct steam inlet is connected with a stripping tube direct steam self-control valve through a stripping tube direct steam check valve, and the upper part of the stripping tube is provided with a stripping tube outlet thermal resistor.
The steam stripping pipe direct steam jet pipe is a steel pipe with a front end welded and sealed by a sealing cover and a plurality of steam jet small holes drilled on the front, back, upper and lower parts of the pipe circumference, and the total open area of the number and the diameter of the steam jet small holes is not larger than the sectional area of the steam stripping pipe direct steam jet pipe.
Preferably, the bottom separation chamber comprises a seal head fixed at the lower end of the stripping tower cylinder, a strong pump is fixed at the bottom in the seal head, a second sleeve is fixed on the side wall of the lower part of the stripping tower cylinder, a strong pump direct steam spray pipe is arranged in the second sleeve in a penetrating way, one end of the strong pump direct steam spray pipe is positioned in the strong pump, one end of the strong pump direct steam spray pipe, which is far away from the stripping tower cylinder, is provided with a strong pump direct steam inlet, the strong pump direct steam inlet is connected with a strong pump direct steam self-control valve through a strong pump direct steam check valve, the bottom end of the seal head is connected with an emptying port, and two double-flange differential pressure liquid level gauges are fixed on the side wall of the lower end of the stripping tower cylinder;
The novel oil pump is characterized in that an oil outlet pipe is connected to the cambered surface of the sealing head, the oil outlet pipe is connected with an oil pump front valve through a third connecting pipe, an oil discharge pipeline is connected to the third connecting pipe, an oil outlet thermal resistor is connected to the oil discharge pipeline, an oil extraction pump and an oil pump outlet check valve are sequentially connected to the valve before Mao Youbeng through a first connecting pipe, an oil level self-control valve is connected to the oil pump outlet check valve through a second connecting pipe, a backflow control valve is connected to the first connecting pipe, and the backflow control valve is connected to the second connecting pipe.
The bypass reflux control valve of the crude oil extraction pump always keeps a certain opening degree even if the crude oil level self-control valve is in an automatic closing state, thereby ensuring the normal operation of the crude oil extraction pump and the maintenance of mechanical sealing.
A grain and oil deep processing extraction method comprises the following steps:
s1: the mixed oil M with certain temperature and concentration is supplied from the second evaporator separation chamber, firstly, the mixed oil M enters the stripping tube from the mixed oil inlet, the superheated steam Q is introduced into the outlet thermal resistor of the stripping tube through the opening of the PID control stripping tube direct steam automatic control valve, the initial stripping is carried out on the mixed oil M, meanwhile, the outlet temperature of the stripping tube is ensured to be at a set required temperature, and the arrangement of the stripping tube reduces the flow rate of the mixed oil M entering the liquid inlet of the sieve-plate type stripping tower;
S2: the mixed oil entering the liquid inlet downcomer is subjected to gas-liquid separation, and mixed gas H formed by solvent gas and water vapor is discharged to a top separation chamber from gaps at two ends of a horizontal liquid baffle reinforcing plate at the top of the liquid inlet downcomer and is extracted from a mixed gas outlet;
s3: the mixed oil M falls to a top layer sieve plate column plate component to be transversely distributed, the mixed oil falls to a next layer sieve plate column plate component through column plate sieve holes under the action of gravity, the rising speed of the mixed oil M from the column plate sieve holes can be influenced by the mixed gas H rising from the column plate sieve holes, meanwhile, the rising resistance of the mixed gas H is increased, due to the interaction of the mixed oil M and the mixed gas H, relatively stable liquid level thickness is formed on the sieve plate column plate component, the gas and the liquid which are in cross flow are subjected to mass transfer and heat transfer in a foam contact state or a jet contact state, the mixed gas H is guided to a region of the sieve plate column plate component with the sieve holes by an overflow weir component, and liquid carried along the overflow weir component is effectively prevented from rising by a second baffle plate and a first baffle plate arranged on the overflow weir component, and the liquid and the rising mixed gas H are guided out for stripping;
s4: the mixed oil M leaking from the periphery of the tray sieve holes to the lower part of the sieve plate tray assembly is diffused to the periphery along the lower surface of the sieve plate tray assembly with different displacements under the action of ascending air flow to form uniform laminar liquid films on two sides of the vertical surface of the dispersing plate, and the uniform laminar liquid films are obliquely thrown out by utilizing the guiding action of the inclined lower edge of each dispersing plate and are subjected to cross steam stripping with the ascending mixed gas H again;
S5: the crude oil Y obtained after the mixed oil M is treated by the sieve plate stripping section falls into a bottom separation chamber, superheated steam Q is sprayed into the bottom separation chamber, the crude oil Y is aggravated to turn over, the diffusion specific surface area of the crude oil is increased again, the separated mixed gas H continuously rises to enter the sieve plate stripping section, the mixed gas H passes through a liquid layer on a sieve plate and column plate component from bottom to top through a column plate sieve pore under the pushing of pressure difference to carry out gas-liquid separation, and the mixed gas H is pumped out to a mixed gas outlet after further separation;
s6: and (5) carrying out subsequent heat exchange and cooling on the extracted qualified crude oil Y.
Compared with the prior art, the invention has the beneficial effects that: the stripping tube is utilized to perform primary stripping, so that the required temperature of the mixed oil entering the sieve-plate type stripping tower is ensured, and meanwhile, the flow rate of the mixed oil entering the liquid inlet of the sieve-plate type stripping tower is reduced; the characteristics of a plurality of layers of mutually staggered sieve plate tower plates of the sieve plate stripping section are fully utilized, the gas-liquid two phases perform better mass transfer and heat transfer processes in a foam or jet contact state on the sieve plate tower plates, a mixed oil laminar film is formed under the action of liquid collection and liquid distribution of the spray plate to perform cross stripping with the ascending mixed gas, the heat of the mixed gas is fully utilized to strengthen the stripping effect, and the lower end of the overflow weir is provided with a guide plate to promote the cross flow and gas-liquid cross flow effect; the baffle plates are arranged at a plurality of positions on the overflow weir, so that adverse factors are eliminated, and liquid entrained by liquid foam along the overflow weir is effectively prevented from rising and is led out to a rising mixed gas space for stripping; the bottom separation chamber is provided with a mammoth pump, so that the diffusion specific surface area of crude oil is increased, and the efficiency of re-stripping is improved; the temperature and liquid level automatic control arrangement is utilized to ensure that the stripping tower reaches the optimal state during operation. The invention solves the problems of low heat utilization efficiency and poor steam stripping effect of the steam stripping tower, realizes the effects of improving the product quality, saving energy and reducing consumption, and brings better economic benefit for enterprises.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a specific embodiment of the present invention;
FIG. 2 is a schematic view of a downcomer according to an embodiment of the present invention;
FIG. 3 is a side view of a liquid inlet downcomer according to an embodiment of the present invention;
FIG. 4 is a top view of a liquid feed downcomer according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a column according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of a support frame for a sieve plate tray assembly in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of a three baffle weir assembly in accordance with an embodiment of the present invention;
FIG. 8 is a side view of a weir assembly with three baffles in an embodiment of the present invention;
FIG. 9 is a schematic view of a two baffle weir assembly according to an embodiment of the present invention;
FIG. 10 is a side view of two baffle weir assemblies in an embodiment of the present invention;
FIG. 11 is a schematic view of the structure of a sieve tray unit in accordance with an embodiment of the present invention;
FIG. 12 is a schematic view of the structure of a sieve tray assembly in accordance with an embodiment of the present invention;
FIG. 13 is a schematic view of a closure panel tray according to an embodiment of the present invention;
FIG. 14 is a schematic view of the structure of a downcomer closing tray assembly according to an embodiment of the invention;
FIG. 15 is a schematic view of a structure of a fixed frame of a sealing disc overflow weir in an embodiment of the present invention;
FIG. 16 is a schematic view of the structure of a downcomer closing tray according to an embodiment of the invention.
In the figure: 1 stripper drum, 2 mixed oil inlet, 3 stripper tube direct steam inlet, 4 stripper tube direct steam automatic control valve, 5 stripper tube direct steam check valve, 6 stripper tube direct steam injection tube, 7 stripper tube, 8 stripper tube outlet thermal resistor, 9 sieve plate stripper liquid inlet, 10 liquid inlet downcomer, 11 vacuum gauge, 12 mixed gas outlet, 13 top separation chamber, 14 manhole door, 15 variable diameter connection section, 16 manhole, 17 overflow weir assembly, 18 sieve plate tray assembly, 19 fourth spray plate, 20 drop channel, 21 downcomer closing disk, 22 downcomer closing disk assembly, 23 bottom separation chamber liquid level sight glass, 24 crude oil level automatic control valve, 25 crude oil pump outlet check valve, 26 crude oil extraction pump, 27 reflux control valve, 28 crude oil pump front valve, 29 crude oil outlet thermal resistor, 30 crude oil outlet tube, 31 drain port, 32 burst pump direct steam injection pipe 33 fierce pump direct steam inlet, 34 fierce pump direct steam check valve, 35 fierce pump direct steam automatic control valve, 36 fierce pump, 37 double flange differential pressure liquid level meter, 38 horizontal baffle plate, 39 upper baffle plate, 40 lower baffle plate, 41 cleaning and adjusting movable plate, 42 middle ring belt tray, 43 end ring belt tray, 44 upright post, 45 first connecting pipe, 46 second baffle plate, 47 first overflow weir plate, 48 second overflow weir plate, 49 third overflow weir plate, 50 fourth overflow weir plate, 51 first baffle plate, 52 tray support seat, 53 second connecting pipe, 54 overflow weir plate connecting flange, 55 baffle plate, 56 fifth spray plate, 57 first sieve plate, 58 third connecting pipe, 59 second sieve plate, 60 bow plate, 61 first spray plate, 62 second spray plate, 63 sieve mesh, 64 fixed screw hole, 65 closure plate tray, 66 closure plate fixing frame 67 liquid drain holes, 68 third shower plate.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
Referring to fig. 1 to 16, a sieve tray unit assembly comprises an overflow weir assembly 17, a sieve tray assembly 18 and a plurality of shower plates, wherein an angle steel tray supporting seat 52 is fixed on the overflow weir assembly 17, the sieve tray assembly 18 is fixed on the angle steel tray supporting seat 52, mixed oil M falls to a top layer sieve tray assembly 18 for transverse flow distribution, the mixed oil falls to a lower layer sieve tray assembly 18 under the action of gravity, the sieve tray assembly 18 is welded on the side wall in a stripping column cylinder 1, two adjacent sieve tray assemblies 18 are installed on the two side walls in the stripping column cylinder 1 in a staggered manner, a plurality of shower plates are fixed below the sieve tray assembly 18, the characteristics of the multi-layer mutually staggered sieve tray assemblies 18 of a sieve stripping section are utilized, gas-liquid two phases are subjected to a better mass transfer and heat transfer process in a foam or jet contact state on the sieve tray assembly 18, the mixed oil passing through sieve holes 63 forms a laminar film with the ascending mixed gas under the action of shower plates and the cloth liquid so as to cross the mixed gas, the heat of the mixed gas is fully utilized, and the cross flow stripping effect of the cross flow is promoted at the lower end of the shower plate assembly 17 is provided with a cross flow guide plate 55.
Referring to fig. 7 to 11, the overflow weir assembly 17 sequentially comprises a first overflow weir plate 47, a second overflow weir plate 48, a third overflow weir plate 49 and a fourth overflow weir plate 50 from bottom to top, wherein the first overflow weir plate 47, the second overflow weir plate 48, the third overflow weir plate 49 and the fourth overflow weir plate 50 are fixedly connected with each other through overflow weir plate connecting flanges 54, the height of the second overflow weir plate 48 is 300mm, the height of the third overflow weir plate 49 is 325mm, the height of the first overflow weir plate 47 is 400mm, the height of the fourth overflow weir plate 50 is 400mm, a deflector 55 is arranged inwards on the lower edge of the first overflow weir plate 47, when the bottom first overflow weir plate 47 is only used on the overflow weir of the bottom downcomer, the height of the bottom first overflow weir plate 47 is 200mm, the deflector 55 is only arranged inwards on the lower edge, the purpose of the closed bottom downcomer closing tray 21 is to prevent the mixed gas from rising into the upper downcomer channel 20 and losing the effects of heat transfer and mass transfer and stripping, the downcomer channel 20 is the channel formed between the weir assembly 17 and the side wall within the bowl 1, and the liquid on the downcomer closing tray 21 is in no contact with the foam or spray liquid, so the bottom first weir plate 47 is no longer provided with baffles, only baffles 55 are provided, the first weir plate 47 and the fourth weir plate 50 are each provided with a first baffle 51 inwardly in the middle, the second weir plate 48 is each provided with a second baffle 46 inwardly in the lower portion, the angle steel tray support 52 is fixed to the third weir plate 49, the angle steel tray support 52 is fixed by the third weir plate 49 and the sieve tray assembly 18, the first baffle 51 and the second baffle 46 are effective to prevent the liquid entrained along the liquid foam of the weir assembly 17 from rising, and the mixed gas H formed by the liquid, the rising solvent gas and the water vapor is led out for stripping.
Referring to fig. 5, 6, 11 and 12, the sieve tray assembly 18 comprises a support frame and a sieve tray connection, the support frame comprises a middle endless belt tray 42 and two end endless belt trays 43, one end of each of the two end endless belt trays 43 is fixed at two ends of the middle endless belt tray 42, the two end endless belt trays 43 and the middle endless belt tray 42 are fixed on the side wall in the stripping column body 1, one end of the two end endless belt trays 43 far away from the middle endless belt tray 42 is fixed with a stand column 44, two ends of a first overflow weir plate 47, a second overflow weir plate 48, a third overflow weir plate 49 and a fourth overflow weir plate 50 are fixed on the two stand columns 44 respectively, and the stand column 44 supports the first overflow weir plate 47, the second overflow weir plate 48, the third overflow weir plate 49 and the fourth overflow weir plate 50 respectively;
the sieve plate column plate connecting piece comprises a first sieve plate column plate 57, a second sieve plate column plate 59 and a bow-shaped column plate 60, wherein a plurality of rows of sieve holes 63 are formed in the first sieve plate column plate 57 and the second sieve plate column plate 59, the sieve holes 63 are in regular triangle arrangement, the diameters of the sieve holes are phi 16-phi 25mm, four rows of sieve holes parallel to chord sides are formed in the first sieve plate column plate 57, six rows of sieve holes parallel to chord sides are formed in the second sieve plate column plate 59, mixed gas H passes through each layer of sieve holes 63 under the pushing of pressure difference, the rising mixed gas H can influence the descending speed of mixed oil M from the sieve holes 63, meanwhile, the rising resistance of the mixed gas H is increased, relatively stable liquid level thickness is formed on the sieve plate column plate component 18 due to the interaction of the two sieve holes, the gas and the liquid which are in cross flow are subjected to mass transfer and heat transfer in a foam contact state or a jet contact state, an angle steel tray support seat 52 is fixed inwards by the third overflow tray 49, the angle steel support seat 52 is positioned at the position of 100mm below a connecting flange 54 of the upper part of the third overflow tray 49, the first sieve plate column plate 57 is fixed on the angle steel support seat 52, and the first sieve plate column plate 52 is fixed on the angle steel support seat 57 through bolts and the angle steel support tray 52;
The inside equidistant a plurality of rectangle ear seats that are fixed with of middle girdle tray 42 and two end girdle tray 43 arc limit, all be fixed with the nut on a plurality of rectangle ear seats, the welt of taking the screw has been placed to the top of a plurality of rectangle ear seats, the arc limit of first sieve tray 57, second sieve tray 59 and bow-shaped tray 60 all is equipped with the fixed screw 64 that corresponds with rectangle ear seat, the nut that rectangle ear seat is connected with first sieve tray 57 and bow-shaped tray 60 respectively is located the below of rectangle ear seat, the nut that rectangle ear seat and second sieve tray 59 are connected is located the top of rectangle ear seat, fix the second sieve tray 59 in the top that the chord limit one end of first sieve tray 57 and bow-shaped tray 60 is submerged, conveniently dismantle second sieve tray 59, form the manhole, make things convenient for staff's maintenance and inspection.
Referring to fig. 1-6, a first shower plate 61 is fixed on the lower surface of the first sieve plate column plate 57, four rows of sieve holes 63 are formed in the first sieve plate column plate 57, the first shower plate 61 is located between the second row and the third row of sieve holes 63, one end of the long chord edge of the first sieve plate column plate 57 and one end of the chord edge of the arched column plate 60 are sunk, the lengths of 35mm chords are reserved at two ends of the long chord edge of the first sieve plate column plate 57 and two ends of the chord edge of the arched column plate 60 respectively, the depth of the thickness of the screen plate is sunk by the rest chord lengths, the sunk part is left 35mm and then folded at right angles to form a folded edge of 35mm, a second shower plate 62 is fixed on the folded edge of the first sieve plate column plate 57, a fifth shower plate 56 is fixed on the folded edge of the arched column plate 60, the fifth shower plate 56 is located on the folded edge of the long chord edge of the first sieve plate column plate 57, the width of the folded edge of 20mm is 20mm, and the width of the second shower plate 61 is folded at an angle of 30 ° opposite to the folded edge of the second shower plate 62;
Six rows of sieve holes 63 parallel to the chord edge are formed in the second sieve plate column 59, two third shower plates 68 are respectively arranged between the second row of sieve holes 63 and the third row of sieve holes 63 and between the fourth row of sieve holes 63 and the fifth row of sieve holes 63 which are arranged from the long chord edge, two third shower plates 68 are arranged on the lower surface of the second sieve plate column 59, folding edges are arranged on the lower edges of the two third shower plates 68, the folding edges of the two third shower plates 68 tilt towards the long chord edge, and the tilting angle is 30 degrees;
a fifth shower plate 56 is fixed on the lower hem of the arched tray 60, a fourth shower plate 19 is fixed on the lower surface of the arched tray 60, the lower edges of the fourth shower plate 19 and the fifth shower plate 56 are respectively provided with a hem, the hem is tilted in the opposite direction, the tilting angle is 30 degrees, liquid under the screen plate assembly 18 diffuses to the shower plate along the lower surface of the screen plate assembly 18 with different displacement under the action of ascending airflow, uniform laminar liquid films are formed on the two sides of the vertical surface of the shower plate, each shower plate is obliquely thrown out by the guiding action of 30 degrees of tilting upwards under each shower plate, cross stripping is carried out again with the ascending mixed gas H, the first shower plate 61 and the second shower plate 62, the fourth shower plate 19 and the fifth shower plate 56 are tilted in the opposite direction of the hem, and the falling liquid is subjected to cross mixed liquid distribution on the lower screen plate assembly 18;
The two ends of the second sieve plate column plate 59 are detachably connected to the sinking edges of the first sieve plate column plate 57 and the arch column plate 60, screw holes which are lapped and fixed with the two sides of the second sieve plate column plate 59 are drilled on the strip surfaces of the sinking parts of the first sieve plate column plate 57 and the arch column plate 60, and connecting holes which correspond to the screw holes of the long chord edge of the first sieve plate column plate 57 and the arch column plate 60 are arranged on the two sides of the second sieve plate column plate 59, and are fixed by using nuts and bolts.
The utility model provides a stripper column equipment, including stripper column 1, stripper column 1 is inside to including sieve strip section and bottom separation chamber from top to bottom, the sieve strip section is including a plurality of sieve column tray unit subassemblies and downcomer closing disk subassembly 22, a plurality of sieve column tray units from the top down equidistant, left and right sides crisscross setting are in inside the sieve strip section, two tip clitellum trays 43 and middle clitellum tray 42 are all fixed on the lateral wall in stripper column 1, sieve column tray unit is seven sets of settings, downcomer closing disk subassembly 22 is located 75mm clean interval departments along bottom sieve column tray unit down.
Referring to fig. 13-16, the downcomer closing tray 21 allows the ascending mixed gas H to effectively enter the area of the sieve holes 63, two sides of the closing plate tray 65 are fixed with closing tray overflow weir fixing frames 66, the chord edge in the closing plate tray 65 is fixed with the downcomer closing tray 21, the downcomer closing tray 21 is arched and provided with a hem with the chord edge being upwards at a right angle of 140mm, the hem is fixedly connected with the closing tray overflow weir fixing frames 66, the arch shape of the downcomer closing tray 21 is larger than the arch shape area of the upper downcomer channel 20, and two liquid discharging net holes 67 are arranged on the downcomer closing tray 21 close to the chord edge, so that no liquid accumulation of the closing tray 21 is ensured when the operation is stopped.
Referring to fig. 1-4, the stripper column 1 is connected with a top separation chamber 13 through a reducing connecting section 15, a vacuum gauge 11 is installed on one side of the upper end of the top separation chamber 13, a mixed gas outlet 12 is arranged at the top of the top separation chamber 13, manhole doors 14 are arranged on the side walls of the top separation chamber 13 and the lower part of the stripper column 1, a plurality of overhaul holes 16 are arranged on the stripper column 1, the uppermost and lowermost overhaul holes 16 are respectively arranged on the horizontal plane of a sieve plate column plate assembly 18 and a bottom downcomer closing disk 21 of the uppermost first sieve plate column plate unit, the rest of overhaul holes 16 are arranged in the middle of a plate interval of one meter of the adjacent sieve plate column plate assembly 18, the overhaul holes 16 are parallel to the overflow weir assembly 17, a sieve plate stripper liquid inlet 9 is arranged at the middle lower part on the inclined surface side wall of the reducing connecting section 15, a sieve plate stripper liquid inlet 7 is connected with a sieve plate stripper liquid inlet 10, and the arrangement of the sieve plate stripper liquid inlet 9 reduces the flow rate of the mixed oil M entering the sieve plate 9;
the liquid inlet downcomer 10 comprises a lower liquid baffle 40 and an upper liquid baffle 39, the lower liquid baffle 40 is positioned at the upper part of the stripping section, the lower end of the upper liquid baffle 39 is abutted against the top of the lower liquid baffle 40, two ends of the upper liquid baffle 39 are fixed on the side wall of the reducing connecting section 15, a horizontal liquid baffle reinforcing plate 38 is fixed in the middle of the upper end of the upper liquid baffle 39, a gap is reserved between the horizontal liquid baffle reinforcing plate 38 and two ends of the stripping column body 1, one end of the horizontal liquid baffle reinforcing plate 38 is fixed on the reducing connecting section 15, a notch is arranged on the right side of the lower end of the lower liquid baffle 40, a cleaning and adjusting movable plate 41 is fixed on the notch, and the cleaning and adjusting movable plate 41 is convenient for cleaning and adjusting the height, so that mixed oil entering the liquid inlet downcomer 10 is subjected to gas-liquid separation.
Referring to fig. 1, the lower end of the stripping tube 7 is provided with a mixed oil inlet 2, the lower end of the stripping tube 7 is sealed by a sealing head, the upper end of the stripping tube 7 is bent to a large-diameter steel tube of a liquid inlet 9 of the sieve-plate type stripping tower by an elbow, one side of the lower part of the stripping tube 7 is connected with a stripping tube direct steam injection tube 6 in a penetrating way through a sleeve, the stripping tube direct steam injection tube 6 is a steel tube with the front end sealed by a sealing cover in a welding way and a plurality of steam injection small holes drilled at the front, back, upper and lower parts of the circumference of the tube, the total opening area of the number and the diameter of the steam injection small holes is not larger than the sectional area of the stripping tube direct steam injection tube 6, one end of the stripping tube direct steam injection tube 6 far from the stripping tube 7 is provided with a stripping tube direct steam inlet 3, the stripping tube direct steam injection valve 4 is connected with the stripping tube direct steam self-control valve through a stripping tube direct steam check valve 5, and the upper part of the stripping tube 7 is provided with a stripping tube outlet thermal resistor 8.
Referring to fig. 1, the bottom separation chamber comprises a sealing head fixed at the lower end of the stripping tower cylinder 1, a first pump 36 is arranged at the bottom of the sealing head, a second sleeve is fixed on the side wall of the lower part of the sealing head, a first pump direct steam spray pipe 32 is arranged in the second sleeve in a penetrating way, one end of the first pump direct steam spray pipe 32 is arranged in the first pump 36, a first pump direct steam inlet 33 is arranged at one end of the first pump direct steam spray pipe 32 far from the stripping tower cylinder 1, the bottom of the first pump direct steam spray pipe 32 sprays overheat steam Q, the wool oil Y is turned over again, the separated solvent steam and the water steam continuously ascend into the stripping section of the sieve plate, the direct steam inlet 33 of the ram pump is connected with the direct steam automatic control valve 35 of the ram pump through the direct steam check valve 34 of the ram pump, the bottom end of the seal head is connected with the emptying port 31, two double-flange differential pressure liquid level meters 37 are fixed on the side wall of the lower end of the stripping column cylinder 1, the bottom separation chamber liquid level sight glass 23 is arranged on the side wall of the bottom of the stripping column cylinder 1, the upper flange and the lower flange of the double-flange differential pressure liquid level meters 37 are respectively arranged on the stripping column cylinder 1 up and down by taking the bottom separation chamber liquid level sight glass 23 as the midpoint, the opening degree of the crude oil level automatic control valve 24 at the outlet of the crude oil pumping pump 26 is controlled by the double-flange differential pressure liquid level meters 37, and the liquid level is ensured to be kept at the bottom separation chamber liquid level sight glass 23;
The cambered surface of the end socket is connected with a crude oil outlet pipe 30, the crude oil outlet pipe 30 is connected with a crude oil pump front valve 28 through a third connecting pipe 58, the third connecting pipe 58 is connected with a crude oil discharge pipeline, the crude oil discharge pipeline is connected with a crude oil outlet thermal resistor 29, the opening of a rapid pump direct steam automatic control valve 35 is controlled through the sieve plate type stripping tower crude oil outlet thermal resistor 29, the oil outlet temperature of the stripping tower is ensured to be in the range of 110-115 ℃, the Mao Youbeng front valve 28 is sequentially connected with a crude oil pumping pump 26 and a crude oil pump outlet check valve 25 through a first connecting pipe 45, the crude oil pump outlet check valve 25 is connected with a crude oil level automatic control valve 24 through a second connecting pipe 53, the first connecting pipe 45 is connected with a reflux control valve 27, the reflux control valve 27 is connected with the second connecting pipe 53, and the bypass reflux control valve 27 of the crude oil pumping pump 26 always maintains a certain opening, and no medium idle running can not occur even if the crude oil level automatic control valve 24 is in an automatic closing state Mao Youbeng, so that normal operation and maintenance of the crude oil pumping 26 is ensured.
A grain and oil deep processing extraction method comprises the following steps:
s1: the mixed oil M with certain temperature and concentration is supplied from a second evaporator separation chamber, firstly enters a stripping tube 7 from a mixed oil inlet 2, the mixed oil M is primarily stripped by passing superheated steam Q through the opening of a PID control stripping tube direct steam automatic control valve 4 at an outlet thermal resistor 8 of the stripping tube, the outlet temperature of the stripping tube 7 is ensured to be at a set required temperature, the set temperature range is between 100 and 110 ℃, and the arrangement of the stripping tube 7 reduces the flow rate of the mixed oil M entering a liquid inlet 9 of a sieve-plate type stripping tower;
S2: the mixed oil entering the liquid inlet downcomer 10 is subjected to gas-liquid separation, and the mixed gas H formed by the solvent gas and the water vapor is discharged to the top separation chamber 13 from the gaps at the two ends of the top horizontal baffle reinforcing plate 38 of the liquid inlet downcomer 10 and is extracted from the mixed gas outlet 12;
s3: the mixed oil M falls to the top layer sieve plate column plate component 18 for transverse flow distribution, the mixed oil falls to the next layer sieve plate column plate component 18 through column plate sieve holes 63 under the action of gravity, the rising mixed gas H from the column plate sieve holes 63 can influence the descending speed of the mixed oil M from the column plate sieve holes 63, meanwhile, the rising resistance of the mixed gas H is increased, due to the interaction of the mixed gas H and the mixed gas, relatively stable liquid level thickness is formed on the sieve plate column plate component 18, the gas and the liquid which are in cross flow are in a foam contact state or a jet contact state for mass transfer and heat transfer process, the mixed gas H is guided to the region of the sieve plate column plate component 18 with the sieve holes 63 by the overflow weir component 17, the second baffle 46 and the first baffle 51 arranged on the overflow weir component 17 effectively prevent the liquid entrained along the overflow weir component 17 from rising, and lead the liquid and the rising mixed gas H to be stripped, meanwhile, the liquid falling channel 20 at the bottom is provided with a downcomer sealing disc 21, the rising mixed gas H is effectively entered into the region 63, and two final discharging discs 21 close to the chord edge are arranged on the downcomer sealing disc 21 to ensure that no liquid is stored when the liquid is sealed and no clean;
S4: the mixed oil M leaking from the periphery of the tray sieve holes 63 to the lower part of the sieve plate tray assembly 18 is diffused to the periphery along the lower surface of the sieve plate tray assembly 18 with different displacement under the action of ascending air flow to form uniform laminar liquid films on the two sides of the vertical surface of the diffuser plate, and is thrown obliquely downwards under the guiding action of the inclined lower edge of each diffuser plate to be subjected to cross steam stripping with the ascending mixed gas H again;
s5: the crude oil Y obtained after the mixed oil M is treated by the sieve plate stripping section falls into a bottom separation chamber, superheated steam Q is sprayed into the bottom separation chamber, the crude oil Y is aggravated to turn over, the crude oil diffusion specific surface area is increased again, the separated mixed gas H continuously rises to enter the sieve plate stripping section, the mixed gas H consists of separated solvent steam and water vapor, the liquid level of the crude oil in the bottom separation chamber controls the opening degree of a crude oil level self-control valve 24 at the outlet of a crude oil extraction pump 26 through a double-flange differential pressure liquid level meter 37, the liquid level is ensured to be kept at a liquid level sight glass 23 of the bottom separation chamber, the mixed gas H is pushed by the differential pressure to pass through a liquid layer on a sieve plate and tray assembly 18 from below through a tray sieve mesh 63, finally, gas-liquid separation is carried out through a top separation chamber 13, and the mixed gas H is extracted to a mixed gas outlet 12 after further separation;
S6: and (5) carrying out subsequent heat exchange and cooling on the extracted qualified crude oil Y.
When the stripping tower section of the stripping tower barrel 1 is manufactured and assembled, the overhaul hole 16 and the bottom separation chamber manhole door 14 are welded on the stripping tower barrel 1; a lower liquid baffle 40 of the liquid inlet downcomer 10 assembled by welding the top in the stripping column cylinder 1 and the axis of the manhole 16 in parallel; on the plane which keeps the clearance between the lower liquid baffle 40 and the sieve plate column plate component 18 at 75mm, the middle ring belt tray 42 of the upper first sieve plate column plate unit is welded on the opposite side of the lower liquid baffle 40, the end ring belt tray 43 is welded, and the joint is corrected; then, the stand column 44 is welded at the end of the tray, after the positioning welding of the support frame of the upper weir screen tray assembly 18 is completed, the middle girdle tray 42 of the second set of screen tray units is welded on the right side of the middle girdle tray 42 on the horizontal plane which is one meter away from the lower surface of the girdle tray of the upper first set of screen tray units, then the end girdle tray 43 and the stand column 44 are welded, and the like, and the arrangement is performed in a left-right staggered manner until the welding of the support frame of the screen tray assembly 18 of the bottom seventh screen tray unit is completed. The sealing plate tray 65 is welded on the opposite side of the bottom middle endless belt tray 42 on the horizontal plane 0.8 m below the endless belt tray of the bottom seventh sieve plate tray unit, and the sealing plate overflow weir fixing frame 66 is vertically welded on the stripping column body 1 at the two ends thereof for viewing, and then the assembly is performed.
First, the downcomer closing tray 21 is fixed by bolts through a screw hole-carrying lining plate and a lug seat which are arranged on the horizontal plane of the filling ring belt tray below the closing plate tray 65, after the fixing is in place, the screw hole-carrying lining plate can be welded on the lug seat, meanwhile, the lug seat can be welded on the lower plane of the closing plate tray 65, so that the assembly and the fixation of the downcomer closing tray 21 are completed, then, the first overflow weir plate 47, the second overflow weir plate 48, the third overflow weir plate 49 and the fourth overflow weir plate 50 of the overflow weir assembly 17 on the bottom seventh sieve plate unit are assembled and fixed by bolts, and the first baffle plate 51, the second baffle plate 46, the tray supporting seat 52 and the liquid inlet guide plate 55 face the direction of the middle ring belt tray 42. Then the first sieve plate 57 is fixed on the tray supporting seat 52 and the end ring belt tray 43 through bolts, and the second sieve plate 59 and the arch plate 60 are fixed at the overlapping positions of the end ring belt tray 43, the middle ring belt tray 42 and the adjacent chord edges through bolts; the direction of the spray plate is downward, and the arc edge of the sieve plate column plate component 18 is fixed in a mode that a lining plate with screw holes and an ear seat are fixed by bolts, wherein the lining plate with screw holes is arranged horizontally on a flat-supplementing ring belt tray below the second sieve plate column plate 59, the first sieve plate column plate 57 and the arched column plate 60, and the ear seat can be welded on the ear seat after fixing in place and the lower plane of the ring belt tray; the second sieve tray 59 is then removed as a manhole passage and reset and secured after the personnel have arrived. The assembly and fixing of the overflow weir assembly 17 and the sieve tray assembly 18 of the remaining sieve tray units is completed in the same manner, sequentially from bottom to top. And if the maintenance and disassembly are needed, the maintenance and disassembly are sequentially carried out from top to bottom.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A sieve tray unit assembly, characterized by: the device comprises an overflow weir assembly (17), a sieve plate column plate assembly (18) and a plurality of spray plates, wherein an angle steel column tray supporting seat (52) is fixed on the overflow weir assembly (17), the sieve plate column plate assembly (18) is fixed on the angle steel column tray supporting seat (52), the spray plates are fixed below the sieve plate column plate assembly (18), and the sieve plate column plate assembly (18) comprises a supporting frame and a sieve plate column plate connecting piece;
the sieve plate column plate connecting piece comprises a first sieve plate column plate (57), a second sieve plate column plate (59) and a bow-shaped column plate (60), wherein a plurality of rows of sieve holes (63) are formed in the first sieve plate column plate (57) and the second sieve plate column plate (59), and the first sieve plate column plate (57) is fixedly connected to the angle steel column plate support seat (52) through bolts;
The lower surface of the first sieve plate column plate (57) is fixedly provided with a first spray plate (61) and a second spray plate (62), the lower edges of the first spray plate (61) and the second spray plate (62) are respectively provided with a folded edge, and the folded edges tilt towards opposite directions;
the lower surface of the second sieve plate column plate (59) is provided with two third spray plates (68), the lower edges of the two third spray plates (68) are respectively provided with a folded edge, and the folded edges of the two third spray plates (68) tilt towards the long chord side direction;
the lower surface of the arched tray (60) is fixedly provided with a fifth shower plate (56) and a fourth shower plate (19), the lower edges of the fourth shower plate (19) and the fifth shower plate (56) are respectively provided with a folded edge, the folded edges tilt towards opposite directions, and two ends of the second sieve tray (59) are respectively and detachably connected with one ends of the first sieve tray (57) and the arched tray (60);
the overflow weir assembly (17) sequentially comprises a first overflow weir plate (47), a second overflow weir plate (48), a third overflow weir plate (49) and a fourth overflow weir plate (50) from bottom to top, a guide plate (55) is inwards arranged at the lower edge of the first overflow weir plate (47), a first baffle plate (51) is inwards arranged at the middle part of the fourth overflow weir plate (50), second baffle plates (46) are inwards arranged at the lower part of the second overflow weir plate (48), and an angle steel tray supporting seat (52) is fixed on the third overflow weir plate (49).
2. The sieve tray unit assembly of claim 1, wherein: the middle parts of the first overflow weir plate (47) and the fourth overflow weir plate (50) are inwards provided with a first baffle (51).
3. The sieve tray unit assembly of claim 2, wherein: the support frame comprises a middle endless belt tray (42) and two end endless belt trays (43), one ends of the two end endless belt trays (43) are respectively fixed at two ends of the middle endless belt tray (42), one end, far away from the middle endless belt tray (42), of the two end endless belt trays (43) is fixedly provided with a stand column (44), and two ends of the first overflow weir plate (47), the second overflow weir plate (48), the third overflow weir plate (49) and the fourth overflow weir plate (50) are respectively fixed on the two stand columns (44);
the middle girdle tray (42) and the inner part of the arc edge of the two end girdle trays (43) are fixed with a plurality of rectangular lugs at equal intervals, a plurality of nuts are fixed on the rectangular lugs, a plurality of lining plates with screw holes are arranged above the rectangular lugs, fixing screw holes (64) corresponding to the rectangular lugs are arranged on the arc edges of the first sieve plate column plate (57), the second sieve plate column plate (59) and the arc column plate (60), the nuts connected with the first sieve plate column plate (57) and the arc column plate (60) are respectively located below the rectangular lugs, and the nuts connected with the rectangular lugs and the second sieve plate column plate (59) are located above the rectangular lugs.
4. A stripping tower device, comprising a stripping tower cylinder (1), characterized in that: the stripping tower cylinder (1) comprises a sieve plate stripping section and a bottom separation chamber from top to bottom, the sieve plate stripping section comprises a plurality of sieve plate column plate unit assemblies and downcomer sealing disc assemblies (22) according to claim 3, the sieve plate column plate unit assemblies are arranged in the sieve plate stripping section from top to bottom at equal intervals in a left-right staggered mode, and two end ring belt trays (43) and an intermediate ring belt tray (42) are fixed on the side wall in the stripping tower cylinder (1).
5. The stripper column assembly of claim 4, wherein: the downcomer sealing disc assembly (22) comprises a sealing plate tray (65) fixed on the inner side wall of the stripping tower cylinder body (1), sealing disc overflow weir fixing frames (66) are fixed on two sides of the sealing plate tray (65), a downcomer sealing disc (21) is fixed on a chord edge in the sealing plate tray (65), the downcomer sealing disc (21) is arranged to be arched and provided with a folded edge with an upward right angle chord edge, the folded edge is fixedly connected with the sealing disc overflow weir fixing frames (66), and two liquid draining holes (67) are formed in the downcomer sealing disc (21) close to the chord edge.
6. The stripper column assembly of claim 4, wherein: the stripping tower cylinder body (1) is connected with a top separation chamber (13) through a reducing connecting section (15), a vacuum gauge (11) is arranged on one side of the upper end of the top separation chamber (13), a mixed gas outlet (12) is arranged at the top of the top separation chamber (13), manhole doors (14) are arranged on the side walls of the lower parts of the top separation chamber (13) and the stripping tower cylinder body (1), a plurality of access holes (16) are arranged on the stripping tower cylinder body (1), the access holes (16) and a plurality of groups of sieve plate column plate unit components are correspondingly arranged, a sieve plate type stripping tower liquid inlet (9) is arranged at the middle lower part on the inclined side wall of the reducing connecting section (15), a stripping pipe (7) is connected on the sieve plate type stripping tower liquid inlet (9), and a liquid inlet downcomer (10) is arranged right in front of the sieve plate type stripping tower liquid inlet (9).
The liquid inlet downcomer (10) comprises a lower liquid baffle (40) and an upper liquid baffle (39), wherein the lower liquid baffle (40) is arranged on the upper portion of the stripping section, the lower end of the upper liquid baffle (39) is abutted to the top of the lower liquid baffle (40), two ends of the upper liquid baffle (39) are fixed on the side wall of the reducing connecting section (15), a horizontal liquid baffle reinforcing plate (38) is fixed in the middle of the upper end of the upper liquid baffle (39), one end of the horizontal liquid baffle reinforcing plate (38) is fixed on the reducing connecting section (15), a notch is formed in the right side of the lower end of the lower liquid baffle (40), and a cleaning and adjusting movable plate (41) is fixed on the notch.
7. The stripper column assembly of claim 6, wherein: the lower extreme of strip pipe (7) is equipped with mixed oil import (2), strip pipe (7) lower part one side is through sleeve pipe through connection has strip pipe direct steam jet pipe (6), strip pipe direct steam jet pipe (6) keep away from the one end of strip pipe (7) and be equipped with strip pipe direct steam import (3), strip pipe direct steam import (3) are connected with strip pipe direct steam automatic control valve (4) through strip pipe direct steam check valve (5), the upper portion of strip pipe (7) is provided with strip pipe export thermal resistor (8).
8. The stripper column assembly of claim 4, wherein: the bottom separation chamber comprises a sealing head fixed at the lower end of the stripping tower cylinder (1), a strong pump (36) is fixed at the bottom of the sealing head, a second sleeve is fixed on the side wall of the lower part of the stripping tower cylinder (1), a strong pump direct steam jet pipe (32) is arranged in the second sleeve in a penetrating way, one end of the strong pump direct steam jet pipe (32) is positioned in the strong pump (36), one end of the strong pump direct steam jet pipe (32) far away from the stripping tower cylinder (1) is provided with a strong pump direct steam inlet (33), the bottom end of the sealing head is connected with a strong pump direct steam check valve (34), and two double flange liquid level gauges (37) are fixed on the side wall of the lower end of the stripping tower cylinder (1), and a bottom separation chamber liquid level view mirror (23) is arranged on the side wall of the bottom of the stripping tower cylinder (1);
Be connected with crude oil outlet pipe (30) on the cambered surface of head, crude oil outlet pipe (30) are connected with crude oil pump front valve (28) through third connecting pipe (58), be connected with crude oil discharge pipe on third connecting pipe (58), be connected with crude oil outlet thermal resistor (29) on the crude oil discharge pipe, valve (28) have connected gradually crude oil pump (26) and crude oil pump outlet check valve (25) through first connecting pipe (45) before Mao Youbeng, crude oil pump outlet check valve (25) are connected with crude oil level self-control valve (24) through second connecting pipe (53), be connected with reflux control valve (27) on first connecting pipe (45), reflux control valve (27) are connected on second connecting pipe (53).
9. A grain and oil deep processing extraction method is characterized in that: the stripping tower device as claimed in claim 4, comprising the following steps:
s1: mixed oil M with certain temperature and concentration is supplied from a second evaporator separation chamber, firstly, the mixed oil M enters a stripping pipe (7) from a mixed oil inlet (2), the opening of a direct steam automatic control valve (4) of the stripping pipe is controlled by PID (proportion integration differentiation) to pass through superheated steam Q at an outlet thermal resistor (8) of the stripping pipe, the mixed oil M is subjected to preliminary stripping, meanwhile, the outlet temperature of the stripping pipe (7) is ensured to be at a set required temperature, and the flow rate of the mixed oil M entering a liquid inlet (9) of a sieve-plate type stripping tower is reduced by the arrangement of the stripping pipe (7);
S2: the mixed oil entering the liquid inlet downcomer (10) is subjected to gas-liquid separation, the mixed gas H formed by solvent gas and water vapor is discharged to the top separation chamber (13) from the gaps at the two ends of the top horizontal baffle reinforcing plate (38) of the liquid inlet downcomer (10), and is extracted from the mixed gas outlet (12);
s3: the mixed oil M falls to a top layer sieve plate column plate component (18) for transverse flow distribution, the mixed oil falls to a next layer sieve plate column plate component (18) through column plate sieve holes (63) under the action of gravity, the mixed gas H rising from the column plate sieve holes (63) can influence the descending speed of the mixed oil M from the column plate sieve holes (63), meanwhile, the rising resistance of the mixed gas H is increased, due to the interaction of the mixed oil M and the mixed gas, a relatively stable liquid level thickness is formed on the sieve plate column plate component (18), the gas and the liquid which are in cross flow are subjected to mass transfer and heat transfer in a foam contact state or a jet contact state, the mixed gas H is guided to a region of the sieve plate column plate component (18) with the sieve holes (63) by an overflow weir component (17), and a second baffle plate (46) and a first baffle plate (51) arranged on the overflow weir component (17) effectively prevent the liquid entrained along the liquid foam of the overflow weir component (17) from rising, and the liquid is guided out and the rising mixed gas H is stripped;
S4: the mixed oil M leaking from the periphery of the tray sieve holes (63) to the lower part of the sieve plate tray assembly (18) is diffused to the periphery along the lower surface of the sieve plate tray assembly (18) with different displacements under the action of ascending air flow, uniform laminar liquid films are formed on the two sides of the vertical surface of the diffuser plate, the mixed oil M is thrown obliquely downwards under the guiding action of the inclined lower edge of each diffuser plate, and the mixed oil M and the ascending mixed gas H are subjected to cross stripping again;
s5: the crude oil Y obtained after the mixed oil M is treated by the sieve plate stripping section falls into a bottom separation chamber, superheated steam Q is sprayed into the bottom separation chamber, the crude oil Y is aggravated to turn over, the diffusion specific surface area of the crude oil is increased again, the separated mixed gas H continuously rises to enter the sieve plate stripping section, the mixed gas H passes through a liquid layer on a sieve plate and column plate assembly (18) from bottom to bottom by the sieve plate sieve holes (63) under the pushing of pressure difference, finally, gas-liquid separation is carried out by a top separation chamber (13), and the mixed gas H is pumped out to a mixed gas outlet (12) after further separation;
s6: and (5) carrying out subsequent heat exchange and cooling on the extracted qualified crude oil Y.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879060.XA CN115253354B (en) | 2022-07-25 | 2022-07-25 | Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879060.XA CN115253354B (en) | 2022-07-25 | 2022-07-25 | Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115253354A CN115253354A (en) | 2022-11-01 |
| CN115253354B true CN115253354B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210879060.XA Active CN115253354B (en) | 2022-07-25 | 2022-07-25 | Screen plate column plate unit assembly, stripping tower device and grain and oil deep processing method |
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| CN (1) | CN115253354B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5318732A (en) * | 1992-12-29 | 1994-06-07 | Uop | Capacity-enhanced multiple downcomer fractionation trays |
| CN1181282A (en) * | 1997-07-31 | 1998-05-13 | 南京大学 | Mixed box tower plate |
| CN202506160U (en) * | 2012-02-29 | 2012-10-31 | 甘肃蓝科石化高新装备股份有限公司 | Slurry stripping tower with overflow weirs |
| CN102961888A (en) * | 2012-12-04 | 2013-03-13 | 天津市创举科技有限公司 | Flow-separation back-mixing-free spraying tower disc |
| CN104383709A (en) * | 2014-11-27 | 2015-03-04 | 天津奥展兴达化工技术有限公司 | Low-resistance efficient column tray |
| CN204307397U (en) * | 2014-12-11 | 2015-05-06 | 捷赛机械（苏州）有限公司 | A kind of double overflow type stripper |
| CN208726777U (en) * | 2018-06-29 | 2019-04-12 | 淮北市星光新材料科技有限公司 | A kind of rectifier unit being used to prepare o-chloraniline |
-
2022
- 2022-07-25 CN CN202210879060.XA patent/CN115253354B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5318732A (en) * | 1992-12-29 | 1994-06-07 | Uop | Capacity-enhanced multiple downcomer fractionation trays |
| CN1181282A (en) * | 1997-07-31 | 1998-05-13 | 南京大学 | Mixed box tower plate |
| CN202506160U (en) * | 2012-02-29 | 2012-10-31 | 甘肃蓝科石化高新装备股份有限公司 | Slurry stripping tower with overflow weirs |
| CN102961888A (en) * | 2012-12-04 | 2013-03-13 | 天津市创举科技有限公司 | Flow-separation back-mixing-free spraying tower disc |
| CN104383709A (en) * | 2014-11-27 | 2015-03-04 | 天津奥展兴达化工技术有限公司 | Low-resistance efficient column tray |
| CN204307397U (en) * | 2014-12-11 | 2015-05-06 | 捷赛机械（苏州）有限公司 | A kind of double overflow type stripper |
| CN208726777U (en) * | 2018-06-29 | 2019-04-12 | 淮北市星光新材料科技有限公司 | A kind of rectifier unit being used to prepare o-chloraniline |
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| CN115253354A (en) | 2022-11-01 |
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