CN1765486A - Continuous high temperature gas solid reactor - Google Patents
Continuous high temperature gas solid reactor Download PDFInfo
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- CN1765486A CN1765486A CN200410086226.4A CN200410086226A CN1765486A CN 1765486 A CN1765486 A CN 1765486A CN 200410086226 A CN200410086226 A CN 200410086226A CN 1765486 A CN1765486 A CN 1765486A
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Abstract
Disclosed a continuous high temperature gas-solid reactor mainly comprises: a solid material inlet (1), a charging valve (2), a cap cover of reactor (3), a main body of reactor (4), inner element units (23), a main shaft (8), a lower cover of reactor (10), a gas inlet (12), a material outlet (13), and a gas outlet pipe (18). Wherein, said solid material inlet (1) and the charging valve (2) are arranged on the top of reactor; the main body of reactor (4) is in the cylinder shape; the main shaft is arranged on the central axis of said reactor; two or more inner element units formed by mixing oar (5), fixed butterfly blade (6) and rotational butterfly blade (7) are parallel vertically mounted on the main shaft; the gas inlet (12) is arranged on bottom of said reactor while the gas outlet pipe (18) is mounted on the upper part of said reactor and above the inner element units. The invention can accurately control the reaction time, continuously charge and discharge material in the condition of high temperature.
Description
Technical field
The present invention relates to have in fixed container the mixer of gyratory agitation device, or rather, is a kind of gas solid reactor that is used for the continuous high temperature technical process.
Background technology
In suitability for industrialized production such as chemical industry, often run into gas and solid reaction problem, generally speaking, adopt the reactor of multiple patterns such as fluid bed, moving bed, spouted bed, fixed bed and batch reactor mostly.Wherein fluid bed can be realized high temperature, serialization production, but requires grain graininess moderate, generally at 40-80um.If granularity is too big, require fluidizing velocity excessive, fluidizing performance is bad; If granularity is too little, because fluidizing velocity is little, fine particle is fluidized wind in a large number and carries away, and causes and reclaims difficulty; The time of staying of solid material in reactor can't accurately be controlled.
To moving bed, spouted bed plug flow reactor, can realize high temperature, serialization production, the material composition gradually changes along reactor, fluid flows forward with identical speed in same cross section, can there be shortcomings such as the adjustable range of skewness, the time of staying is limited in solid material, the solid powder thinner for grain graininess, there is the problem of solid material tail gas recycle difficulty too in this reactor.
There are intermittently operated in fixed bed reactors and reactor, can't carry out the problem that continuity is produced.
CN1448211A has disclosed a kind of continuous gas-solid reactor, this reactor can be realized continuous feed, discharging, and inside has stirring blade and baffle plate, still can't control accurately the time of staying of solid powder, the residence time of material that can have is too short, has short circuit phenomenon.
In sum, do not relate to as yet in the prior art a kind of under hot conditions, can accurately control the reaction time, serialization input and output material, no solid powder reclaim the gas solid reactor of difficulty.
Summary of the invention
The object of the present invention is to provide a kind ofly under hot conditions, can accurately control the gas solid reactor of reaction time, serialization input and output material.
Reactor provided by the present invention mainly comprises with lower member: solid material charging aperture 1, charging valve 2, reactor skull 3, reactor body 4, inner member unit 23, main shaft 8, reactor lower cover 10, gas access 12, bleeder valve 13, gas outlet tube 18; Wherein, described solid material charging aperture 1 and charging valve 2 are arranged at the top of this reactor, reactor body 4 is a round barrel shape, main shaft is arranged on the central axis of this reactor, and two or more by stirrer paddle 5, fixedly the inner member unit formed of butterfly sheet 6, rotation butterfly sheet 7 is vertically mounted on the main shaft in parallel to each other; Gas access 12 is arranged at this reactor bottom, and gas outlet tube 18 is arranged at the top of this reactor, and is positioned on the inner member unit.
Compared with prior art, the present invention mainly shows the advantage of following aspect:
1, the present invention is fully in conjunction with low speed fixed bed and advantages such as mechanical agitation, material toggling, the continued operation of realization response device under high-temperature condition and accurate characteristics such as control time.
2, by the stirring of driven by motor stirring arm, material toggling, solid material is in layer added inlet from powder from top to bottom move, control the quantity of the rotating speed and the inner member unit of suitable shaft, can accurately control the time of staying of solid powder.
3, under the certain situation of structure of reactor, can be in the scope of broad the rotating speed of conditioned reaction device main shaft, i.e. the frequency of driving motor, therefore, can be in the time of staying of scope inner control solid material in reactor of broad.
4, the speed of gas penetration material is very low in this reactor, does not exist a large amount of gases to carry solid particle, has reduced the complicated very thin situation of exhaust gas recovery system, particularly solid material of a cover that causes therefrom.
5, in course of reaction, solid material moves downward from top to bottom from level to level, and at every layer is all arranged certain time of staying, and stirring, material toggling by stirrer paddle are fully rolled solid material, reduces the situation in the reaction dead band of general fixed bed.Also reduce simultaneously phenomenons such as solid material bridge formation.
6, this reactor is a kind of continuous fixed bed reactors, and tolerance is less, does not therefore have solid material and reclaims difficulty, particularly to very thin solid material (such as 1-3um), solves its course of reaction tail gas recycle problem.Solid material enters in the reactor from charge door, by the downward from level to level material toggling of mechanical agitation, discharges from discharging opening; Gas is entered by reactor bottom, penetrates solid material from level to level, is discharged by the outlet of top tail gas, and in this process, solid material contacts, reacts with gas, the whole system closed-loop operation.
Description of drawings
Fig. 1 is the structural representation of gas solid reactor provided by the present invention.
Fig. 2 is the partial enlarged drawing and the sectional top view of gas solid reactor provided by the present invention.
Fig. 3 is a stirrer paddle structural representation of the present invention.
Fig. 4 is a fixedly butterfly chip architecture schematic diagram of the present invention.
Fig. 5 is a rotation butterfly chip architecture schematic diagram of the present invention.
The specific embodiment
Further specify reactor provided by the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, reactor provided by the present invention mainly comprises with lower member: solid material charging aperture 1, charging valve 2, reactor skull 3, reactor body 4, stirrer paddle 5, fixedly butterfly sheet 6, rotation butterfly sheet 7, main shaft 8, reactor lower cover 10, gas access 12, gas access control valve 11, bleeder valve 13, gas vent 18, gas vent control valve 19.In addition, the present invention also comprises following accessory: awl end agitator 14, heater 15, heat-insulation layer 16, temperature detecting head 17, driving motor 20, gas distributor 24 etc.
Reactor body 4 of the present invention is a round barrel shape, fixedlys connected with reactor skull 3 in its top, fixedlys connected with reactor lower cover 10 in the bottom.The present invention does not have special requirement for the ratio of height to diameter of reactor body and the concrete shape of reactor skull and lower cover, and the ratio of height to diameter that this area is commonly used and the shape of reactor skull and lower cover all are applicable to the present invention.Described reactor body can be made of coaxial and close-connected each other more piece cylinder 9, also can adopt overall structure.The joint number of the concrete cylinder that adopts 9 of described reactor body can be according to the requirement of technical process, and for example, the time of staying of reaction mass etc. is determined.The joint number of the cylinder 9 that is adopted can be installed in stirrer paddle on the main shaft 8, fixedly butterfly sheet, the supporting setting of rotation butterfly sheet.The junction of described each pitch circle tube can compress sealing by pad.Whole reactor main body and inner member unit are the center with the reactor center axis all, strict centering.The reactor main shaft is driven by external motor by belt pulley or sprocket wheel etc., and rotating speed of motor is by Frequency Converter Control, and whole reactor can be born certain pressure.
Inner member of the present invention unit is a from top to down by stirrer paddle, fixedly butterfly sheet and rotation butterfly sheet are formed.As shown in Figure 2, in this reactor stirrer paddle 5, rotation butterfly sheet 7 and fixedly butterfly sheet 6 be vertically mounted in parallel to each other on the main shaft 8.Two or more above-mentioned inner members unit is set in this reactor in parallel to each other.
The structure of described fixedly butterfly sheet 6 is the porous disc of a hollow as shown in Figure 4, and its diameter equates substantially with the internal diameter of reactor.Fixedly in this reactor, its top is provided with stirrer paddle 5 to the butterfly sheet perpendicular to main shaft and horizontal fixed, and the below is provided with rotation butterfly sheet 7.Fixedly have a certain amount of aperture and one or more radially slotted hole on the butterfly sheet, for example, the fixedly butterfly sheet shown in Fig. 4 is provided with two radially slotted holes.The percent opening of aperture is 5-60% on the described fixedly butterfly sheet, and the aperture of described aperture is 1-2cm; The area of described radially slotted hole accounts for the fixedly 5-10% of butterfly sheet area.The present invention for the shape of the aperture on the fixing butterfly sheet and radially the shape and size of slotted hole do not have special requirement.Aperture described here is the passage of gas penetration solid powder; Radially the effect of slotted hole mainly is downward one deck inner member discharge.Fixedly use soft packing seal between the center hole of butterfly sheet 6 and the main shaft.
Fixedly the below of butterfly sheet is the rotation butterfly sheet 7 with main axis rotation, and the structure of described rotation butterfly sheet 7 is one to have the hollow porous disc of the cut-out of fan-shaped or other shape as shown in Figure 5.The diameter of rotation butterfly sheet is slightly less than the internal diameter of reactor.Need guarantee to rotate the butterfly sheet and in the process of main axis rotation, not have friction with the inwall of reactor.Have a certain amount of aperture on the rotation butterfly sheet, percent opening is 5-60%, preferred 8-30%, and the aperture of described aperture is 1-2cm.Described cut-out area fan-shaped or other shape accounts for the 5-10% of rotation butterfly sheet area.Aperture is the passage that the gas material of participation reaction penetrates solid powder.The present invention does not have the shape and size restriction for the cut-out and the aperture of rotation butterfly sheet, and described cut-out can be fan-shaped, also can be the straight line portion parallel with diameter, as dotted line among Fig. 5.
As shown in Figure 3, described stirrer paddle 5 is made up of material toggling blade 21 and stirring vane 22.The effect of stirring vane 22 mainly is to stir material, makes material fixedly keep certain thickness on the butterfly sheet 6.The effect of material toggling blade 21 mainly is to dial to catch up with material.Stirring vane has certain distance from fixing butterfly sheet, and the material toggling blade has fine gap between the two near fixing butterfly sheet.In the main shaft rotation process, when the fan-shaped cut-out of the radially slotted hole of fixing butterfly sheet 6 and rotation butterfly sheet 7 overlaps, material toggling blade 21 to lower floor fixedly the butterfly sheet dial and catch up with material; After discharge finished, fixedly the radially slotted hole of butterfly sheet 6 staggered with the fan-shaped cut-out of rotation butterfly sheet 7, in time closes this discharging channel, to prevent gas material short circuit thus.When mounted, preferably make material toggling blade 21 stop RADIAL and be in same position substantially, see Fig. 2 with rotation butterfly sheet 7 fan-shaped cut-outs.Stirring vane 22 can be provided with 2-6, preferred 2-4; Angle between the adjacent stirring vane and stirring vane can equate with angle between the adjacent material toggling blade, also can not wait, but angle between the preferred adjacent stirring vane and stirring vane equate with angle between the adjacent material toggling blade.The effect of stirring vane mainly is that the fallen material in upper strata is pushed aside, and on the fixedly butterfly sheet that they are divided equably at this layer.
The certain angle setting of should staggering of the radially slotted hole of the fixedly butterfly sheet 6 in this reactor between the adjacent two layers inner member, with prevent each layer fixedly the radially slotted hole on the butterfly sheet open simultaneously, cause the short circuit of gas material.In addition, the quantity of vertical range in the reactor of the present invention between adjacent two groups of inner member unit and the inner member unit that is adopted should be according to concrete technological requirement from determining, for example, the vertical range between adjacent two groups of inner member unit can be reactor inside diameter 0.5-2 doubly.
On the main shaft of the bottom of this reactor body, reactor lower cover 10 inside, agitator 14 is installed.This agitator rotates under the drive of main shaft, and its effect is that the material that enters bottom part body is stirred, and with the caking that prevents material, compacting etc., makes material waltz through discharging opening rotary valve 13 and discharges.
The outer wall of this reactor body is equipped with heating system 15 and heat-insulation layer 16, so that the reaction temperature of necessity is provided for reactor.Temperature in the reactor is by 17 monitorings of temperature thermal probe.Described heating system can directly heat, and also can utilize the heat carrier heat exchange.
Solid material charging aperture 1 of the present invention and charging valve 2 are arranged at the top of this reactor, and fixedly connected with reactor skull 3 and be connected, the solid material that enters this reactor can be entered by charging aperture 1 and charging valve 2 top from this reactor body.By the inlet amount of described charging valve 2 control solid materials, the preferred rotatory sealing valve of this charging valve, but be not limited to the rotatory sealing valve.
The main shaft 8 of reactor of the present invention can rotate under the drive of transmission device and motor 20, also can rotate under the drive of other extrinsic motive.
Reactor bottom, reactor lower cover 10 inboards are provided with gas distributor 24, and this gas distributor can make the gas material that enters reactor evenly distribute in reactor.This gas distributor can be made up of the double Shell chuck, and outer chuck can be dismantled, and cleaning landing when reaction enters the solid powder of chuck.
When very big or entrained solids powder is serious when the exhaust emissions amount, need to adopt the tail gas dust collecting system.Can adopt whirlwind collection or other dust pelletizing system, such as, bag-type dust, electric precipitation also can be with several dust pelletizing systems comprehensive utilizations.
The workflow of reactor provided by the present invention is as follows: solid material enters through charging aperture 1 and charging valve 2 top from this reactor; And gas material through the gas access 12 and gas access control valve 11 enter from the bottom of this reactor, and under the effect of gas distributor, evenly distribute.Two groups or more by stirrer paddle 5, fixedly the inner member unit that constitutes of butterfly sheet 6, rotation butterfly sheet 7 is perpendicular to main shaft and be arranged in parallel to each other in this reactor.Solid material at first falls into fixedly butterfly sheet of last layer, and stirrer paddle rotates under the drive of main shaft, realize for solid material catch up with material, material toggling and discharge, and in this process, contact, react with gas material from reactor lower part.When on the fan-shaped cut-out on the rotation butterfly sheet and the fixing butterfly sheet radially slotted hole overlaps the time, the fixing fixing butterfly sheet of one deck below the effect of material toggling blade falls into of the solid material on the butterfly sheet, thus the butterfly sheet finished from the upper strata fixedly to the fixing discharge process of butterfly sheet of lower floor.Said process repeats, and falls into the bottom of this reactor up to solid material.Participate in behind the gas material gas coming through distributor of reaction by rotation butterfly sheet and fixedly the perforate on the butterfly sheet successively upwards flow, contact, react with solid material simultaneously.The time of staying of solid material in this reactor by the number of material toggling blade in motor speed, the reactor, fixedly butterfly sheet and rotation butterfly sheet number, fixedly the factors such as number of the radially slotted hole on the butterfly sheet are controlled.When above-mentioned structure of reactor parameter one timing, the frequency of regulating motor can accurately be controlled the time of staying of solid material in reactor.
Following embodiment will give further instruction to the present invention, but therefore the present invention is not subjected to any restriction.
Embodiment 1
Present embodiment explanation: adopt gas solid reactor provided by the present invention to carry out gas-solid reaction, can accurately control the reaction time of solid reactant.
Make a gas solid reactor according to description of the invention, its structure as shown in Figure 1.The internal diameter of this reactor is 500mm, the height of reactor is 2500mm, establish 8 layers of inner member unit in the reactor altogether, the total height of inner member unit is 1600mm in the reactor, this reactor is by electrical heating, about 250 ℃ of reactor interior reaction temperature, rotating speed of motor can be regulated at 0.1～100rpm, charging and discharging are controlled by rotatory sealing, gas is entered by the bottom air inlet pipe, and the size of gas flow is by the control of bottom control valve, according to the degree that reflects material, the time of staying that can control solid reactant was accurately controlled the reaction time in 1～20 minute.Utilizing this reactor is 85% NaY molecular sieve with solid content, with SiCl
4Gas reaction, the 9 minutes reaction time of control.Detect the 99%NaY reaction after the reaction, the SiCl in the tail gas
4Content is 0.1%, the about 3M of tail gas air quantity
3/ h, the direct water of tail gas absorbs, and does not have the tail gas collecting problem.
Comparative Examples 1
Utilizing fluid bed is 85% NaY molecular sieve with solid content, with SiCl
4Gas reaction, the reaction time is by the calculating mean residence time of solid material at fluid bed, and about 90～120 minutes, because the requirement of fluidized-bed reactor fluidizing gas velocity, under identical NaY molecular sieve treating capacity, SiCl
4Gas flow is 10～20 times of the foregoing description, simultaneously because NaY molecular sieve granularity at 2～6um, need be carried out multistage cyclone, trap filter to its dried tail gas, and system complex, fine powder reclaims difficulty.
Comparative Examples 2
The equipment that utilizes Chinese patent application 02116287.5 to be provided carries out NaY molecular sieve and SiCl
4Gas reaction, material mean residence time 14 minutes because stirring vane adopts the multilayer baffle plate down, on principle, can't accurately be controlled the time of staying of material, works as SiCl
4Gas passes after the solids bed of material, can directly walk short circuit and discharge from charging aperture, can contain a certain amount of SiCl in the reaction end gas
4Gas also increases certain difficulty to tail gas collecting simultaneously.
Claims (11)
1, a kind of continuous high temperature gas solid reactor is characterized in that this reactor mainly comprises with lower member: solid material charging aperture (1), charging valve (2), reactor skull (3), reactor body (4), inner member unit (23), main shaft (8), reactor lower cover (10), gas access (12), bleeder valve (13), gas outlet tube (18); Wherein, described solid material charging aperture (1) and charging valve (2) are arranged at the top of this reactor, reactor body (4) is a round barrel shape, main shaft is arranged on the central axis of this reactor, and two or more by stirrer paddle (5), fixedly butterfly sheet (6), the inner member unit formed of rotation butterfly sheet (7) are vertically mounted on the main shaft in parallel to each other; Gas access (12) is arranged at this reactor bottom, and gas outlet tube (18) is arranged at the top of this reactor, and is positioned on the inner member unit.
2, according to the reactor of claim 1, it is characterized in that the top of described reactor body fixedlys connected with reactor skull (3), fixedly connected with reactor lower cover (10) in its underpart.
3,, it is characterized in that described reactor body is made of coaxial and close-connected each other more piece cylinder (9), perhaps adopts integrally-built reactor body according to the reactor of claim 1.
4,, it is characterized in that described reactor body and inner member unit are that the center is provided with the reactor center axis all according to the reactor of claim 1.
5, according to the reactor of claim 1, it is characterized in that described reactor also comprises following accessory: awl end agitator (14), heater (15), heat-insulation layer (16), temperature detecting head (17), driving motor (20), gas distributor (24).
6, according to the reactor of claim 1, it is characterized in that described fixedly butterfly sheet (6) is the porous disc of a hollow, its diameter equates substantially with the internal diameter of reactor; Fixedly the butterfly sheet is fixed in this reactor perpendicular to main shaft, and its top is provided with stirrer paddle (5), and the below is provided with rotation butterfly sheet (7); Fixedly have aperture and one or more radially slotted hole on the butterfly sheet.
7, according to the reactor of claim 6, it is characterized in that the percent opening of aperture on the described fixedly butterfly sheet is 5-60%, the aperture of described aperture is 1-2cm; The area of described radially slotted hole accounts for the fixedly 5-10% of butterfly sheet area.
8, according to the reactor of claim 1, it is characterized in that described rotation butterfly sheet is one to have the hollow porous disc of the cut-out of fan-shaped or other shape, the diameter of rotation butterfly sheet is slightly less than the internal diameter of reactor; Have aperture on the rotation butterfly sheet, percent opening is 5-60%, and the aperture of described aperture is 1-2cm; Described cut-out area fan-shaped or other shape accounts for the 5-10% of rotation butterfly sheet area.
9,, it is characterized in that described stirrer paddle (5) is made up of material toggling blade (21) and stirring vane (22) according to the reactor of claim 1; When mounted, make the material toggling blade and the termination RADIAL of the fan-shaped cut-out of rotation butterfly sheet be in same position; Stirring vane is provided with 2-6; The material toggling blade is provided with 1; Angle between the adjacent stirring vane and stirring vane equate with angle between the adjacent material toggling blade.
10, according to the reactor of claim 1, the radially slotted hole that it is characterized in that the fixedly butterfly sheet in the adjacent two-layer inner member unit setting of should staggering.
11,, it is characterized in that on the inner main shaft in the bottom, reactor lower cover (10) of described reactor body agitator (14) being installed, and this agitator rotates under the drive of main shaft according to the reactor of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100862264A CN100344361C (en) | 2004-10-28 | 2004-10-28 | Continuous high temperature gas solid reactor |
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| CNB2004100862264A CN100344361C (en) | 2004-10-28 | 2004-10-28 | Continuous high temperature gas solid reactor |
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| CN1765486A true CN1765486A (en) | 2006-05-03 |
| CN100344361C CN100344361C (en) | 2007-10-24 |
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| CN103243019A (en) * | 2012-02-03 | 2013-08-14 | 彭世英 | Apparatus and process for producing biological energy source by household organic waste and sludge |
| CN102223946B (en) * | 2008-11-25 | 2013-09-04 | 奥图泰有限公司 | An open pressurised agitated reactor and a method for mixing gas and slurry with each other |
| CN103341344A (en) * | 2013-07-19 | 2013-10-09 | 山东巨业精细化工有限公司 | High-temperature gas-solid reaction kettle |
| CN103561860A (en) * | 2011-05-27 | 2014-02-05 | Lg化学株式会社 | Scc having improved removal object mobility |
| CN104549105A (en) * | 2014-12-31 | 2015-04-29 | 丹阳市助剂化工厂有限公司 | Efficient reactor for production and processing of epoxy soybean oil |
| CN105597397A (en) * | 2016-03-10 | 2016-05-25 | 西安交通大学 | On-line continuous stable-pressure discharge filter for supercritical water treatment technology |
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| CN112044362A (en) * | 2020-08-17 | 2020-12-08 | 安徽亚格盛电子新材料有限公司 | Continuous synthesis device for magnesium chloride |
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| CN1181907C (en) * | 2002-03-29 | 2004-12-29 | 中国石油化工股份有限公司 | Gas-solid reactor |
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| CN102223946B (en) * | 2008-11-25 | 2013-09-04 | 奥图泰有限公司 | An open pressurised agitated reactor and a method for mixing gas and slurry with each other |
| CN103561860A (en) * | 2011-05-27 | 2014-02-05 | Lg化学株式会社 | Scc having improved removal object mobility |
| US9162210B2 (en) | 2011-05-27 | 2015-10-20 | Lg Chem, Ltd. | SCC with improvied mobility of material to be removed |
| CN103561860B (en) * | 2011-05-27 | 2016-05-04 | Lg化学株式会社 | Need to remove the improved SCC of mobility of material |
| CN103243019A (en) * | 2012-02-03 | 2013-08-14 | 彭世英 | Apparatus and process for producing biological energy source by household organic waste and sludge |
| CN103341344A (en) * | 2013-07-19 | 2013-10-09 | 山东巨业精细化工有限公司 | High-temperature gas-solid reaction kettle |
| CN103341344B (en) * | 2013-07-19 | 2015-12-02 | 山东巨业精细化工有限公司 | A kind of high-temperature gas-solid reactor |
| CN104549105A (en) * | 2014-12-31 | 2015-04-29 | 丹阳市助剂化工厂有限公司 | Efficient reactor for production and processing of epoxy soybean oil |
| CN105597397A (en) * | 2016-03-10 | 2016-05-25 | 西安交通大学 | On-line continuous stable-pressure discharge filter for supercritical water treatment technology |
| CN105664556A (en) * | 2016-03-10 | 2016-06-15 | 西安交通大学 | Spiral sealing continuous discharging filter for supercritical water treatment technology |
| CN105597397B (en) * | 2016-03-10 | 2018-06-26 | 西安交通大学 | A kind of on-line continuous voltage stabilizing discharge filter for supercritical water treatment technique |
| CN105664556B (en) * | 2016-03-10 | 2018-06-26 | 西安交通大学 | A kind of helixseal continuous pulp discharge filter for supercritical water treatment technique |
| CN107537409A (en) * | 2016-06-25 | 2018-01-05 | 上海品颜料有限公司 | Cascade oxidation reaction method and its component and application |
| CN107537409B (en) * | 2016-06-25 | 2023-06-30 | 上海一品颜料有限公司 | Cascade oxidation reaction method, assembly and application thereof |
| CN109573534A (en) * | 2017-09-28 | 2019-04-05 | 湖南三德科技股份有限公司 | Automatic adding device and adding method for analysis of coal sample |
| CN112044362A (en) * | 2020-08-17 | 2020-12-08 | 安徽亚格盛电子新材料有限公司 | Continuous synthesis device for magnesium chloride |
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