CN201161986Y - Two-step reaction device for preparing acetylene with dry method - Google Patents
Two-step reaction device for preparing acetylene with dry method Download PDFInfo
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- CN201161986Y CN201161986Y CNU200720081218XU CN200720081218U CN201161986Y CN 201161986 Y CN201161986 Y CN 201161986Y CN U200720081218X U CNU200720081218X U CN U200720081218XU CN 200720081218 U CN200720081218 U CN 200720081218U CN 201161986 Y CN201161986 Y CN 201161986Y
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Abstract
The utility model provides a two-step reaction device for preparing acetylene in a dry method, which comprises a charging spout, a bell which is communicated with the charging spout, a first reactor, a second reactor, wherein a casing body is arranged in the first reactor, a first differential power head which is driven by a motor, a first stirrer of a high-speed agitating shaft and a first stirrer which is arranged in the casing body and is driven by the first differential power head, blades which are arrayed according to different helical angles are arranged on the high-speed agitating shaft and the low-speed agitating shaft to achieve the kneading of differential rotation, a casing body which is arranged in the second reactor, a second differential power head which is driven by the motor, a low-speed revolution turn arm which is driven by the second differential power head and a second stirrer of a conical agitating shaft with high-speed rotation are arranged in a conical casing body, a first cooling water jacket with a water inlet and a water outlet is arranged on the casing body of the first reactor, and a second cooling water jacket with a water inlet and a water outlet is arranged on the casing body of the second reactor. The two-step reaction device can continuously produce, saves water, and has high efficiency and excellent security.
Description
Technical field:
The utility model is relevant with the device of dried preparation acetylene, and is special relevant with the two-step reaction device of dried preparation acetylene.
Background technology:
Acetylene (C
2H
2) be important Organic Chemicals, China is main at present to adopt calcium carbide route to produce acetylene, and the acetylene of polyvinyl chloride (PVC) industry accounts for more than 90% of the total consumption of national calcium carbide with the calcium carbide amount, and year consumption of calcium carbide amount is more than 1,000 ten thousand tons.
The production technique of carbide acetylene, for many years because the singularity of carbide acetylene reaction, adopt wet process technology always, being about to calcium carbide is positioned in the water surrounding more than 10 times and carries out hydration reaction, calcium carbide is statically placed in the water with the form of block, reacts for a long time in jumbo water surrounding, utilizes the function of strong heat release and aerogenesis bubbling, make the water local turbulence, to remove calcium carbide surface reaction product slaked lime (Ca (OH)
2), and bring in constant renewal in the reaction surface of calcium carbide, thus reach the purpose of complete reaction.In water surrounding, react, solved the inflammable and explosive production safety problem of acetylene and the cooling problem of reaction water.But wet production technology, need a large amount of water to participate in reaction on the one hand, need a large amount of energy consumptions that water is separated from slimy carbide slag on the other hand again, simultaneous water resources problems, problem of environmental pollution and carbide slag utilize problem etc. again in the production process.
The drying acetylene technology mainly is that the by product carbide slag that obtains after the reaction is a dry powder; highlighted advantage at aspects such as energy-conservation, water saving, environment protection and carbide slag utilize again; be the important topic that the PVC industry is able to sustainable development, be put into " the environmental protection technology catalogue of national encourage growth ".
In recent years, also there are some R﹠D institutions and enterprise to be engaged in the R﹠D work of drying acetylene, claim according to reports, mainly contain two kinds of forms, a kind of main reactor is a tank body multilayer tower tray spray-type, require calcium carbide be prepared as fine particle (＜4mm), subject matter is: 1, calcium carbide is pulverized meticulous easy deliquescence, loses too big; Too fierce when 2, fine powder reacts, meet accident easily; 3, the tank body volume is big, and danger increases.Second kind of main reactor is the horizontal duplex spray-type of constant speed, and subject matter is: 1, stir can not self-cleaning for the constant speed duplex, can not force to upgrade calcium carbide particulate reaction surface, and reaction efficiency is not high; 2, because agitator can not self-cleaning, easily caking, obstruction.More than two kinds of main reactors, all rest on the development of the non-imposed dynamic response that does not possess self-cleaning function.
The utility model content:
The utility model purpose is in order to overcome above deficiency, to provide a kind of energy continuous production, efficient height, water saving, the two-step reaction device of the dried preparation acetylene that security is good.
The utility model purpose is achieved like this:
The two-step reaction device of the utility model dried preparation acetylene comprises hopper, the bell of at least two polyphones that communicate with the hopper discharge port, first reactor, second reactor, the bell opening for feed that the band butterfly valve is arranged on the bell, the bell discharge port, nitrogen inlet, air, have in first reactor and contain first opening for feed that communicates with the bell discharge port, the housing of first discharge port and the first acetylene air outlet, be subjected to the first differential-speed dynamic head of driven by motor, be positioned at shell intravital have be subjected to high-speed stirring axle that the first differential-speed dynamic head drives and first agitator of stirring at low speed axle, high, the blade of arranging by different helix angles is set on the stirring at low speed axle to be mediated to realize that differential rotates, have in second reactor and contain second opening for feed that communicates with first reactor, first discharge port and the conical shell of second discharge port, be subjected to the second differential-speed dynamic head of driven by motor, be positioned at intravital second agitator of conical shell, the connecting lever that is subjected to the low speed revolution of second differential-speed dynamic head drive by the low speed tubular shaft is arranged in second agitator, reach the taper stir shaft that the planet helical bevel gear pair that is connected with the high speed central shaft is subjected to the high speed rotation of second differential-speed dynamic head drive by the high speed central shaft, first acetylene air outlet of first reactor and the second acetylene air outlet of second reactor are communicated with first water-sealed tank and second water-sealed tank respectively, first cooling water jecket of bringing the mouth of a river and water outlet into is arranged on first reactor shell, second cooling water jecket of bringing the mouth of a river and water outlet into is arranged on second reactor shell, regulate the temperature of reaction in the controlling reactor by the water yield.
Nitrogen inlet, the first explosion bleed outlet are arranged on the first above-mentioned reactor shell, nitrogen inlet, the second explosion bleed outlet are arranged on second reactor shell, the first explosion bleed outlet and the second explosion bleed outlet are communicated with the safe water sealed cans, reach the purpose of safety relief, nitrogen inlet on first and second reactor is when being used for newly feeding intake, and uses with the nitrogen replacement air.
The reciprocating sieve that above-mentioned second reactor, the second discharge port place has opening for feed to be communicated with it, the eccentric back and forth linkage assembly that the driven by motor of being subjected to is arranged in the reciprocating sieve, the sieve nest that driven by eccentric back and forth linkage assembly, the tilting screen cloth in relative opening for feed position in the sieve nest, the screen overflow discharge port is arranged on the sieve nest, the screen underflow discharge port, the screen overflow discharge port, the screen underflow discharge port respectively with the screen overflow worm conveyor, the screen underflow worm conveyor communicates, the screen overflow opening for feed that communicates with screen overflow worm conveyor discharge port and hopper is arranged respectively on the circulator, the screen overflow drain hole, circulator can adopt bucket elevator or screw lift(elevator) etc.
The place, the first acetylene air outlet of the first above-mentioned reactor and the place, the second acetylene air outlet of second reactor have the adjusting calcium carbide to prepare the standby water-in of the transformation efficiency of acetylene respectively, make its transformation efficiency maximization.
The characteristics of calcium carbide hydration reaction:
According to calcium carbide hydration reaction equation:
CaC
2+2H
2O→C
2H
2+Ca(OH)
2+127.19J/mol
In a single day calcium carbide contacts with water, strong hydration reaction promptly takes place, and produces acetylene and also emits a large amount of heat (liberated heat was 397Kcal/Kg when the general industry calcium carbide decomposed), resultant acetylene and Ca (OH)
2Be slightly soluble in water.The fierce degree (speed of response) of reaction is relevant with the following aspects:
1., relevant with calcium carbide purity: calcium carbide is calcium oxide and the coke block product that molten refining obtains in electric furnace, its effective ingredient and non-uniform Distribution.The calcium carbide hydration reaction speed that purity is high is fast, and the calcium carbide hydration reaction speed that purity is low is slow.
2., relevant with the block size of calcium carbide: the calcium carbide of same purity, the speed of response that block (particle) is big is slow, the speed of response that block (particle) is little is fast;
3., with calcium carbide particle surface hydration reaction product C a (OH)
2Can be relevant by immediate removal: if reaction product can not be from the calcium carbide surface removal, and the topped calcium carbide surface that is accumulated in, to reacting unfavorable;
4., relevant with the temperature of reaction condition: the temperature of reaction condition must be controlled, temperature of reaction too high (〉=100 ℃), the reaction water vaporization is to reacting unfavorable;
5., relevant with the purity of reaction water: calcium content is high and contain the high water of acetylene amount, and the speed that participates in the calcium carbide reaction is slow, and calcium content is low and contain the low water of acetylene amount, and the speed that participates in the calcium carbide reaction is fast.
The danger of calcium carbide and acetylene:
1., calcium carbide easy moisture absorption in air is decomposed, and is produced acetylene gas;
2., calcium carbide meets water and can produce strong exothermal reaction, makes the hurried intensification of reaction environment;
3., contain the impurity ferrosilicon in the calcium carbide, between ferrosilicon or the collision of ferrosilicon and other metal (mainly referring to ferrous metal) be easy to generate spark, cause accidental explosion;
4., acetylene is flammable explosive gas: pure acetylene and air mixed can form explosion gases, and the explosive range of pure acetylene content in air is 2.3～81%;
5., acetylene and oxygen mix be easy to generate blast, mix with water vapor and be difficult for producing blast;
6., the proportion (1.171Kg/m of pure acetylene
3) than air (1.293Kg/m
3) lower slightly, upwards floating easily in air, diffusion;
7., pure acetylene should avoid contacting, generate acetylene---the compound of copper with metallic copper for a long time, this compound also is the unsafe factor of acetylene gas accidental explosion.
During the utility model work, new material (calcium carbide particle) by sending into the feed screw machine behind the nitrogen replacement, continuously is transported to first reactor by the feed screw machine through hopper, bell, finishes first reaction.Reacted material is transported to second reactor continuously, finish second reaction and after storing, be transported to reciprocating sieve continuously and sieve, screen overflow is transmitted back to hopper through screen overflow transfer roller and circulator, and screen underflow (dry acetylene sludge powder) is transported to packaging facilities through the screen underflow worm conveyor.
Key is first reactor in the utility model device, second reactor.First reactor is a double-shaft spiral differential kneader: be the patent " twin shaft differential retrograde rotation screw-pair " (patent No. ZL00244986.2) obtained according to the applicant for principle according to the characteristics of calcium carbide hydration reaction and the special purpose reactor of requirement of safe production design.This reactor has functions such as kneading, pulverizing, stirring, conveying, self-cleaning, chuck heat exchange simultaneously, can satisfy the processing condition requirement of first conversion zone.In the aqueous vapor environment, particle surface is carried out mandatory renewal, and self agitator can obtain cleaning, thereby created good reaction environment, satisfy the high calcium carbide of purity to greatest extent and finish hydration reaction at short notice, the heat of hurried generation can be transmitted to the reactor outside by the chuck heat exchange in the reaction process.
Second reactor is a planet helicon reactor, and it is principle that this reactor promotes with planet public affairs, rotation cone-type spiral, and the material of different moisture content, variable grain degree is fully stirred, and satisfies the requirement of its deferred reaction.This reactor also has storing, feeding, chuck cooling and slag gas separates and air pressure is subjected to functions such as material sealing, the equipment integral resistance to air loss is good, can satisfy the processing condition and the long requirement of the residence time of second conversion zone, and be mounted with the explosion bleed outlet that can satisfy safety relief.
The utility model energy continuous production, the efficient height, water saving, security is good.
Description of drawings:
Fig. 1 is the utility model apparatus structure synoptic diagram.
Fig. 2 is the bell structural representation.
Fig. 3 is the first structure of reactor synoptic diagram.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is the second structure of reactor synoptic diagram.
Fig. 6 is the reciprocating sieve structural representation.
Embodiment:
Referring to Fig. 1, the two-step reaction device of the utility model dried preparation acetylene comprises first bell 2, second bell 3 of 1, two polyphone of hopper, feed worm conveyor 4, first reactor, 5, the second reactors 6, reciprocating sieve 7, screen overflow worm conveyor 8, screen underflow worm conveyor 9, circulator 10 (can adopt bucket elevator or screw lift(elevator) etc.), first water-sealed tank 11, second water-sealed tank 12, safe water sealed cans 47.
As shown in Figure 2, first bell, 2 opening for feeds and hopper connecting place are equipped with inlet mouth d1, the air outlet a4 that belt switch is arranged on first butterfly valve, 13, the first bells.Second butterfly valve 14 is equipped with in the second bell opening for feed and the first bell discharge port junction, and the bottom is a discharge port 15.The inlet mouth d2 of belt switch is housed on second bell.First, second bell 2,3 is the biconical container, and charging and nitrogen replacement process are as follows:
(1), close butterfly valve 14, opened butterfly valve 13, calcium carbide enters bell 2 through hopper 1, butterfly valve 13, in this process, the nitrogen dilution that the air in the bell 2 charge into through inlet mouth d1;
(2), when granularity after crushed be after calcium carbide particle that the calcium carbide particle of 15～25mm accounts for whole calcium carbide particulate 85% is at least filled bell 2, close butterfly valve 13, the nitrogen that charges into through inlet mouth d1, air in the bell is carried out three displacements, the air that cements out is discharged by air outlet a4, finally reaches air in the bell 2 by nitrogen metathetical purpose oxygen level＜0.5% as far as possible fully;
(3), after the air in the bell 2 are replaced fully by nitrogen, opened butterfly valve 14, calcium carbide enter bell 3, discharge continuously through bell 3 and discharge port 15.
(4), inlet mouth d2 is a nitrogen replacement mouth before the whole process device power-up.
Referring to Fig. 3, Fig. 4, first reactor is to be principle with " twin shaft differential retrograde rotation screw-pair " (patent No. ZL00244986.2), comprise by what feed worm conveyor 4 communicated with the second bell discharge port and contain first opening for feed 16, first discharge port 17, the first acetylene air outlet a1, a2, the first explosion bleed outlet b1, water main inlet port c1, standby water-in c2, nitrogen inlet d2, the housing 18 of d3, motor is the differential-speed dynamic head 19 of power, high rotating speed transmission of power is given stir shaft 21 in the agitator 20, the slow speed of revolution is passed to stir shaft 22, on two stir shafts the blade of arranging by different helix angles is set, the screw-blade 23 of high speed shaft is realized the performance that the differential kneading is stirred with slow speed of revolution axial screw blade 24, the solid-liquid phase material that stirs is reached the pressure dynamic response, and the purpose of agitating auger blade phase mutual energy self-cleaning.Housing 18 outer first cooling water jeckets 25 that contain water coolant import and export f1, f2 that are equipped with.
Before the start, the air in the reaction vessel is discharged by air outlet a1, a2 behind the nitrogen dilution that nitrogen mouth d2, d3 charge into, and finally reaches the metathetical purpose.
The calcium carbide particle is entered continuously by opening for feed 16, and reaction water is sprayed continuously by water main inlet port c1 and enters.Through stirring reaction, the acetylene gas of generation is sent into first water-sealed tank by air outlet a1, a2.Reactive material is discharged continuously through discharge port 17.Temperature of reaction is taken out of through chuck entery and delivery port f1, f2 by water coolant.
Referring to Fig. 1, Fig. 5, second reactor is that to promote with planet public affairs, rotation spiral be the planet helicon reactor of principle, comprises the conical shell 29 of second discharge port 28 of second opening for feed 26 that communicates with first reactor, the first material mouth and band flow valve 27 and the second explosion bleed outlet b2, standby water-in C3, nitrogen inlet d4, air outlet a3.Motor is the second differential-speed dynamic head 30 of power, slow speed of revolution power is passed to the connecting lever 33 that has revolution by agitator 31 hollow mandrels 32, high rotating speed power is passed to the cone-type spiral stir shaft 38 that has rotation by central shaft 34 and through planet helical bevel gear 35, transmission shaft 36 and planet helical bevel gear 37, agitator 31 carries out public affairs, rotation operation in conical shell 29, make the solid-liquid phase material that is stirred reach the response behaviour in the ternary motion flow field of circumferential movement stream B, spiral lifter motion stream C, downward axial flow D.Conical shell 29 outer second cooling water jeckets 46 that contain cooling water intakeoutfall f3, f4 that are equipped with.
Feed worm conveyor, first reactor, the part that contacts with material in second reactor adopt stainless steel to make.
Before the start, the nitrogen dilution that the air in the reaction vessel charges into through nitrogen mouth d3, d4, the back is discharged by air outlet a3, finally reaches the metathetical purpose.
The reaction mass that comes out through first reactor is entered continuously by opening for feed 26, and in case of necessity, reaction water is sprayed continuously by standby water-in c3 and enters.Through stirring reaction, the acetylene gas of generation is sent into water seal by air outlet a3.Reactive material is discharged by discharge port 28 more continuously through flow valve 27 controls.Temperature of reaction is taken out of through chuck intake-outlet f3, f4 by water coolant.
Referring to Fig. 6, reciprocating sieve is that the eccentric back and forth linkage assembly 40 of power is a power to comprise motor 29, and it is reciprocating to drive sieve nest 41, and material enters tilting screen cloth 43 through opening for feed 42, and material is sieved.Screen overflow is through 44 dischargings of screen overflow discharge port, and screen underflow is through 45 dischargings of screen underflow discharge port.
Referring to Fig. 1, new material (calcium carbide particle) by sending into feed screw machine 4 behind the nitrogen replacement, continuously is transported to first reactor 5 by feed screw machine 4 through hopper 1, bell 2,3, finishes first reaction.Reacted material is transported to second reactor 6 continuously, finish second reaction and after storing, be transported to reciprocating sieve 7 continuously and sieve, screen overflow is transmitted back to hopper 1 through screen overflow transfer roller 8 and circulator 10, and screen underflow (dry acetylene sludge powder) is transported to packaging facilities (installing outside the flow process) through screen underflow worm conveyor 9.
The acetylene that the acetylene that first reactor produces is delivered to the generation of water-sealed tank 11, the second reactors through a1, a2 mouth is delivered to second water-sealed tank 12 through the a3 mouth.The explosion bleed outlet b2 of the explosion bleed outlet b1 of first reactor and second reactor is discharged into the gas of venting of dust explosion under the improper situation in the atmosphere through safe water sealed cans 47.After merging, the acetylene gas of water-sealed tank 11,12 outlets is transported to gas holder (flow process is installed) outward.
The reaction water (clear water) through water main inlet port c1, send into first reactor 5.In case of necessity, be sent to first reactor 5 and second reactor 6 respectively through standby water-in C2, C3.
The foregoing description is that foregoing of the present utility model is further described, but this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to the foregoing description.All technology that realizes based on foregoing all belong to scope of the present utility model.
Claims (4)
1, the two-step reaction device of dried preparation acetylene, it is characterized in that comprising hopper, the bell of at least two polyphones that communicate with the hopper discharge port, first reactor, second reactor, the bell opening for feed that the band butterfly valve is arranged on the bell, the bell discharge port, nitrogen inlet, air, have in first reactor and contain first opening for feed that communicates with the bell discharge port, the housing of first discharge port and the first acetylene air outlet, be subjected to the first differential-speed dynamic head of driven by motor, be positioned at shell intravital have be subjected to high-speed stirring axle that the first differential-speed dynamic head drives and first agitator of stirring at low speed axle, high, the blade of arranging by different helix angles is set on the stirring at low speed axle to be mediated to realize that differential rotates, have in second reactor and contain second opening for feed that communicates with first reactor, first discharge port and the conical shell of second discharge port, be subjected to the second differential-speed dynamic head of driven by motor, be positioned at intravital second agitator of conical shell, the connecting lever that is subjected to the low speed revolution of second differential-speed dynamic head drive by the low speed tubular shaft is arranged in second agitator, reach the taper stir shaft that the planet helical bevel gear pair that is connected with the high speed central shaft is subjected to the high speed rotation of second differential-speed dynamic head drive by the high speed central shaft, first acetylene air outlet of first reactor and the second acetylene air outlet of second reactor are communicated with first water-sealed tank and second water-sealed tank respectively, first cooling water jecket of bringing the mouth of a river and water outlet into is arranged on first reactor shell, second cooling water jecket of bringing the mouth of a river and water outlet into is arranged on second reactor shell.
2, the two-step reaction device of dried preparation acetylene as claimed in claim 1, it is characterized in that nitrogen inlet is arranged on first reactor shell, the first explosion bleed outlet, nitrogen inlet, the second explosion bleed outlet are arranged on second reactor shell, and the first explosion bleed outlet and the second explosion bleed outlet are communicated with the safe water sealed cans.
3, the two-step reaction device of dried preparation acetylene as claimed in claim 1 or 2, it is characterized in that the reciprocating sieve that second reactor, the second discharge port place has opening for feed to be communicated with it, the eccentric back and forth linkage assembly that the driven by motor of being subjected to is arranged in the reciprocating sieve, the sieve nest that driven by eccentric back and forth linkage assembly, the tilting screen cloth in relative opening for feed position in the sieve nest, the screen overflow discharge port is arranged on the sieve nest, the screen underflow discharge port, the screen overflow discharge port, the screen underflow discharge port respectively with the screen overflow worm conveyor, the screen underflow worm conveyor communicates, and the screen overflow opening for feed that communicates with screen overflow worm conveyor discharge port and hopper is arranged respectively on the circulator, the screen overflow drain hole.
4, the two-step reaction device of dried preparation acetylene as claimed in claim 1 or 2 is characterized in that the place, the first acetylene air outlet of first reactor and the place, the second acetylene air outlet of second reactor have the adjusting calcium carbide to prepare the standby water-in of the transformation efficiency of acetylene respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720081218XU CN201161986Y (en) | 2007-09-25 | 2007-09-25 | Two-step reaction device for preparing acetylene with dry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720081218XU CN201161986Y (en) | 2007-09-25 | 2007-09-25 | Two-step reaction device for preparing acetylene with dry method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201161986Y true CN201161986Y (en) | 2008-12-10 |
Family
ID=40182927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720081218XU Expired - Fee Related CN201161986Y (en) | 2007-09-25 | 2007-09-25 | Two-step reaction device for preparing acetylene with dry method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201161986Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871093A (en) * | 2021-01-14 | 2021-06-01 | 万华化学集团股份有限公司 | Reaction system for continuously removing damaged catalyst |
-
2007
- 2007-09-25 CN CNU200720081218XU patent/CN201161986Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871093A (en) * | 2021-01-14 | 2021-06-01 | 万华化学集团股份有限公司 | Reaction system for continuously removing damaged catalyst |
| CN112871093B (en) * | 2021-01-14 | 2022-09-20 | 万华化学集团股份有限公司 | Reaction system for continuously removing damaged catalyst |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20110925 |