CN101338222B - PVC acetylene phase feeder and feeding process thereof - Google Patents
PVC acetylene phase feeder and feeding process thereof Download PDFInfo
- Publication number
- CN101338222B CN101338222B CN2007100248670A CN200710024867A CN101338222B CN 101338222 B CN101338222 B CN 101338222B CN 2007100248670 A CN2007100248670 A CN 2007100248670A CN 200710024867 A CN200710024867 A CN 200710024867A CN 101338222 B CN101338222 B CN 101338222B
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- China
- Prior art keywords
- valve
- feeding
- bin
- feeding warehouse
- acetylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims description 41
- 238000007600 charging Methods 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010073 coating (rubber) Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 241001247986 Calotropis procera Species 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 25
- 239000005997 Calcium carbide Substances 0.000 description 24
- 238000012545 processing Methods 0.000 description 7
- 239000002893 slag Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007868 post-polymerization treatment Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention discloses a novel PVC acetylene gas phase feeding machine and the feeding process. Without acetylene leakage, the gas phase is continually fed. The feeding machine consists of a feeding bin, a recovering bin and a storing bin; the feeding bin and the storing bin are connected through a plurality of hydraulic push rod devices; the feeding bin can move up and down against the storing bin; the recovering bin is arranged between the feeding bin and the storing bin; the recovering bin and the feeding bin are sealed through a rubber bush; the recovering bin is respectively provided with a C2H2 recovering valve and N2; the operation of the device can adopt a PLC programmable control system for accurate and automatic control. The three bins play a main role in acetylene feeding, acetylene recovery and acetylene storing. The feeding bin is used as the hydraulic valve, a guide shaft is used as the guide track to move up and down after emptying the feeding bin and the acetylene gas is discharged and recovered. The present invention decreases the production cost, increases the economic benefit and reduces the pollutant discharge and the impact on environment.
Description
Technical field: the present invention relates to the calcium carbide charging machine in a kind of calcium carbide wet method (dry method) PVC device acetylene generation chemical unit, particularly relate to when the production system malleation, under the situation that acetylene gas does not leak, the calcium carbide charging machine and the feeding process thereof of discontinuity charging in the gas phase.
Technical background: the calcium carbide process PVC resin relies on production cost than the oil ethylene process stronger competitive edge to be arranged, and becomes that domestic PVC production equipment is newly-built, the prefered method of enlarging, reconstruction project, and calcium carbide process PVC output has accounted for more than 60% of gross domestic product.The calcium carbide process PVC production process is divided into chemical engineering unit operation operations such as acetylene takes place, vinylchlorid is synthetic, scale is washed, compression, fractionation, tail suction, polymerization, post-polymerization treatment, dry packing, carbide slag processing.At present, the domestic PVC of having enterprise is carrying out the research of drying acetylene producer, it is reported: adopt the evengranular calcium carbide in broken back in the drying acetylene producer, to react, the acetylene yield can reach more than 98%, the 1kg calcium carbide only needs water 1.3kg, efficiently solve carbide slag supernatant fluid and handle difficult and acetylene yield problem on the low side, but the charging system of calcium carbide is consistent with wet method acetylene PVC production technique device.After calcium carbide adds producer, generate thick acetylene gas with the water reaction, contain impurity, moisture such as S, P through removal after, send the vinylchlorid synthesizer; Regularly the carbide slag slurries of discharging is delivered to the carbide slag treatment unit with the slag stock pump.The charging of calcium carbide all is to feed in raw material when system's barotropic condition, that is is constantly to add calcium carbide by charging machine to the gas phase device space that is full of acetylene of reacting, and satisfies the material balance of explained hereafter system.Like this, in the time of charging, nitrogen replacement, will discharge the nitrogen a large amount of with consumption, environment, safety are brought very big influence with the acetylene gas of calcium carbide equal volume.
The calcium carbide charging machine that uses is produced in domestic calcium carbide process PVC production equipment acetylene generation chemical engineering unit operation, be the mechanical type charging machine, need in the time of reinforced to replace with nitrogen, the technical process shortcoming mainly is: discharged acetylene gas and a large amount of nitrogen of consumption with the calcium carbide equal volume in reinforced.
With device capability 360kt/a PVC (calcium carbide route) is example, and the specified consumption of calcium carbide is 522kt/a, the stacking volume of the each feeding quantity of charging machine:
(calcium carbide tap density: 1.13～1.2m
3/ t; Each feeding quantity: 3.5 tons)
So, the C that charging machine gives off when annual reinforced
2H
2Volume is:
By processing condition, conversion C
2H
2The gas standard volume is: 548047Nm
3/ year;
So, 360kt/a PVC production equipment, the C of the annual emission loss of charging machine
2H
2Folding meter CaC
2Loss amount is:
Summary of the invention: novel PVC acetylene phase charging machine is at the defective of traditional calcium carbide process PVC charging machine existence and the economic feasibility of production, and the per GDP energy consumption that proposes according to national Eleventh Five-Year Plan outline reduces by 20% restrictive index and the product innovation of development and design.The utilization of novel PVC acetylene phase charging machine will further improve the energy, resource utilization, reduce the generation and the discharging of pollutent, with the least possible resource consumption and circlet border cost as far as possible, make enterprise obtain maximum economic benefits.
The present invention is achieved in that a kind of PVC acetylene phase charging machine, form by feeding warehouse, recovery bin and blowing storehouse, described feeding warehouse and blowing storehouse link together by some hydraulic push rod device B, and described feeding warehouse can move up and down with respect to the blowing storehouse; Described feeding warehouse is provided with exhaust-valve, N
2Valve A, opening for feed and emptying door, described emptying door is fixed on the described feeding warehouse by hydraulic push rod device A; Described blowing storehouse is provided with feeding gate and drain hole, and described feeding gate is fixed on the described blowing storehouse by hydraulic push rod device A, realizes the unlatching and the closure of described emptying door and feeding gate by hydraulic push rod device A; It is characterized in that: between described feeding warehouse and blowing storehouse, be provided with recovery bin, described recovery bin is fixed on the cylinder barrel of described hydraulic push rod device B, seal by rubber coating between described recovery bin and the feeding warehouse, on described recovery bin, be respectively arranged with C
2H
2Recovery valve and N
2Valve B.
Between described feeding warehouse and blowing storehouse, be provided with liner.
Described blowing storehouse is provided with access opening.
A kind of feeding process flow process of PVC acetylene phase charging machine is as follows:
1. check emptying door, feeding gate, C
2H
2Recovery valve, exhaust-valve, N
2Whether valve A and B close;
2. open exhaust-valve, the N of feeding warehouse successively
2Valve A, N
2Valve A pressure transfers to 0.02Mpa, and confirms N
2The sound that valve A has obvious nitrogen to discharge, time swap 〉=2 minute;
3. replace the N that confirms feeding warehouse after 2 minutes
2Open emptying door under the situation of pressure≤0.02Mpa, again pressure is increased to displacement 25-35 second more than the 0.05Mpa, close emptying door;
4. continuing logical N
2Situation under the operation of feeding in raw material, close the N of feeding warehouse successively
2Valve A and exhaust-valve;
5. open the emptying door of feeding warehouse, to the recovery bin blowing, blowing finishes and closes emptying door;
6. open the feeding gate in blowing storehouse, to the charging of blowing storehouse, charging finishes and closes feeding gate;
7. open the C of recovery bin
2H
2Recovery valve, feeding warehouse is descending, reclaims acetylene gas and is compressed to production system;
8. after feeding warehouse 3 comes downwards to lower-most point, close C
2H
2Recovery valve is opened N
2Valve B, pressure: 〉=0.05Mpa, feeding warehouse begins up, gets back to the original position and closes N
2Valve B.
The present invention compared with prior art has following advantage:
1, novel acetylene phase charging machine can not efflux under the processing condition of acetylene gas under the processing condition of system's malleation, finishes the raw-material charging of calcium carbide;
2, the reinforced time can manufacture and design according to user's processing condition, and this machine has adopted the integrated control techniques of PLC hydraulic pressure, stable and reliable for performance, can be in any highly automated locking, and safe in utilization;
3, equipment has been set up C
2H
2Gas malleation, sealing retrieving arrangement can effectively reduce PVC calcium carbide unit consumption index, improve the calcium carbide utilization ratio, reduce the generation and the discharging of pollutent;
4, equipment is installed and can not changed former mill construction, does not increase auxiliary kinds of construction expense, and Installation and Debugging are simple, and the level of automation height is reliable;
5, equipment installed capacity≤5kW, inner liner abrasive resistant, Ultralow Carbon Stainless Steel 00Cr17Ni14Mo2 material, the manufacturing accuracy height, and maintenance requirement is low, and it is convenient that accessory is changed, and maintenance cost is few.
Description of drawings: Fig. 1 is the structural representation of PVC acetylene phase charging machine of the present invention
1. opening for feed 2. exhaust-valves 3. feeding warehouses 4. hydraulic push rod device A 5. emptying doors
6. rubber coating 7. recovery bins 8. hydraulic push rod device B 9.N
2Valve A 10. feeding gates
11. blowing storehouse 12. access openings, 13. liner 14.N
2Valve B 15.C
2H
2Recovery valve 16. drain holes
Embodiment: as can be seen from Figure 1, a kind of PVC acetylene phase charging machine, form by feeding warehouse 3, recovery bin 7 and blowing storehouse 11, described feeding warehouse 3 and blowing storehouse 11 link together by some hydraulic push rod device B8, and described feeding warehouse 3 can move up and down with respect to blowing storehouse 11; Described feeding warehouse 3 is provided with exhaust-valve 2, N
2Valve A9, opening for feed 1 and emptying door 5, described emptying door 5 is fixed on the described feeding warehouse 3 by hydraulic push rod device A4; Described blowing storehouse 11 is provided with feeding gate 10 and drain hole 16, and described feeding gate 10 is fixed on the described blowing storehouse 11 by hydraulic push rod device A4, realizes the unlatching and the closure of described emptying door 5 and feeding gate 10 by hydraulic push rod device A4; It is characterized in that: between described feeding warehouse 3 and blowing storehouse 11, be provided with recovery bin 7, described recovery bin 7 is fixed on the cylinder barrel of described hydraulic push rod device B8, seal by rubber coating 6 between described recovery bin 7 and the feeding warehouse 3, on described recovery bin 7, be respectively arranged with C
2H
2Recovery valve 15 and N
2Valve B14.
For feeding warehouse 3 can be moved up and down with respect to blowing storehouse 11 accurately, between described feeding warehouse 3 and blowing storehouse 11, be provided with liner 13.
For the ease of blowing storehouse 11 is cleaned and overhauled, described blowing storehouse 11 is provided with access opening 12.
The effect of calcium carbide charging, acetylene recovery, calcium carbide blowing is mainly played in three storehouses, by utilizing feeding warehouse as hydraulic valve, after feeding warehouse has been put material, is the guiding conduct with the axis of guide, moves up and down, and effluxes the recovery acetylene gas.Overcome the shortcoming of former charging machine effectively, can not reclaim acetylene gas with the feed bin equal volume two storehouse chargings.Equipment operation design has taked the PLC programmable control system to control, and can control the main equipment precise structure to processing requirements such as reinforced times, processing and manufacturing accuracy requirement height, good sealing effect can improve operating environment greatly, realizes advantages such as control automatically.Owing to increased acetylene gas sealing, retrieving arrangement, when production is reinforced, do not had C
2H
2Gas evolution, consideration equipment can safely and steadily run, each reinforced will be with certain nitrogen, consumption has only half of former charging machine or still less; Equipment can be according to the needs of producing quantitatively continuously or the adding material that is interrupted, and operation can be controlled automatically, and work situation improves greatly.
The feeding process flow process of PVC acetylene phase charging machine is as follows:
1. check emptying door 5, feeding gate 10, C
2H
2Recovery valve 15, exhaust-valve 2, N
2Whether valve A9 and B14 close;
2. open exhaust-valve 2, the N of feeding warehouse 3 successively
2Valve B14, N
2Valve A9 pressure transfers to 0.02Mpa, and confirms N
2The sound that valve A9 has obvious nitrogen to discharge, time swap 〉=2 minute;
3. replace the N that confirms feeding warehouse 3 after 2 minutes
2 Open emptying door 5 under the situation of pressure≤0.02Mpa, again pressure is increased to displacement 25-35 second more than the 0.05Mpa, close emptying door 5;
4. continuing logical N
2Situation under the operation of feeding in raw material, close the N of feeding warehouse 3 successively
2Valve A9 and exhaust-valve 2;
5. open the emptying door 5 of feeding warehouse 3, to recovery bin 7 blowings, blowing finishes and closes emptying door 5;
6. open the feeding gate 10 in blowing storehouse 11, to 11 chargings of blowing storehouse, charging finishes and closes feeding gate 10;
7. open the C of recovery bin 7
2H
2Recovery valve 15, feeding warehouse 3 is descending, reclaims acetylene gas and is compressed to production system;
8. after feeding warehouse 3 comes downwards to lower-most point, close C
2H
2Recovery valve 15 is opened N
2Valve B14, pressure: 〉=0.05Mpa, feeding warehouse 3 beginnings are up, get back to the original position and close N
2Valve B14.
The installation of novel charging machine can be adjusted by the feed opening in blowing storehouse voluntarily according to former charging machine mounting height and position, can not increase the expense of the auxiliary kinds of construction of scrap build, system peace; Can realize unit replacing installation, make PVC production system decrement in short-term (about 15 days), but can under the situation of not stopping, finish the technological transformation debugging installation of novel charging machine.
Claims (4)
1. PVC acetylene phase charging machine, form by feeding warehouse (3), recovery bin (7) and blowing storehouse (11), described feeding warehouse (3) and blowing storehouse (11) link together by some hydraulic push rod device B (8), and described feeding warehouse (3) can move up and down with respect to blowing storehouse (11); Described feeding warehouse (3) is provided with exhaust-valve (2), N
2Valve A (9), opening for feed (1) and emptying door (5), described emptying door (5) is fixed on the described feeding warehouse (3) by hydraulic push rod device A (4); Described blowing storehouse (11) is provided with feeding gate (10) and drain hole (16), described feeding gate (10) is fixed on the described blowing storehouse (11) by hydraulic push rod device A (4), realizes the unlatching and the closure of described emptying door (5) and feeding gate (10) by hydraulic push rod device A (4); It is characterized in that: between described feeding warehouse (3) and blowing storehouse (11), be provided with recovery bin (7), described recovery bin (7) is fixed on the cylinder barrel of described hydraulic push rod device B (8), seal by rubber coating (6) between described recovery bin (7) and the feeding warehouse (3), on described recovery bin (7), be respectively arranged with C
2H
2Recovery valve (15) and N
2Valve B (14).
2. a kind of PVC acetylene phase charging machine according to claim 1 is characterized in that: be provided with liner (13) between described feeding warehouse (3) and blowing storehouse (11).
3. a kind of PVC acetylene phase charging machine according to claim 1, it is characterized in that: described blowing storehouse (11) is provided with access opening (12).
4. the feeding process flow process according to the described a kind of PVC acetylene phase charging machine of claim 1 is as follows:
Check emptying door (5), feeding gate (10), C
2H
2Recovery valve (15), exhaust-valve (2), N
2Whether valve A (9) and B (14) close;
Open exhaust-valve (2), the N of feeding warehouse (3) successively
2Valve A (9), N
2Valve A (9) pressure transfers to 0.02Mpa, and confirms N
2The sound that valve A (9) has obvious nitrogen to discharge, time swap 〉=2 minute;
Replace the N that confirms feeding warehouse (3) after 2 minutes
2Open emptying door (5) under the situation of pressure≤0.02Mpa, again pressure is increased to displacement 25-35 second more than the 0.05Mpa, close emptying door (5); Continuing logical N
2Situation under the operation of feeding in raw material, the N that closes feeding warehouse (3) successively
2Valve A (9) and exhaust-valve (2);
Open the emptying door (5) of feeding warehouse (3), to recovery bin (7) blowing, blowing finishes and closes emptying door (5);
Open the feeding gate (10) in blowing storehouse (11), to blowing storehouse (11) charging, charging finishes and closes feeding gate (10);
Open the C of recovery bin (7)
2H
2Recovery valve (15), feeding warehouse (3) is descending, reclaims acetylene gas and is compressed to production system;
After feeding warehouse (3) comes downwards to lower-most point, close C
2H
2Recovery valve (15) is opened N
2Valve B (14), pressure 〉=0.05Mpa, feeding warehouse (3) beginning is up, gets back to the original position and closes N
2Valve B (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100248670A CN101338222B (en) | 2007-07-05 | 2007-07-05 | PVC acetylene phase feeder and feeding process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100248670A CN101338222B (en) | 2007-07-05 | 2007-07-05 | PVC acetylene phase feeder and feeding process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101338222A CN101338222A (en) | 2009-01-07 |
| CN101338222B true CN101338222B (en) | 2011-06-22 |
Family
ID=40212394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100248670A Expired - Fee Related CN101338222B (en) | 2007-07-05 | 2007-07-05 | PVC acetylene phase feeder and feeding process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101338222B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064361B (en) * | 2012-12-04 | 2015-01-28 | 北京化工大学 | Automatic control device and method of acetylene generating device in feeding process based on knocking vibration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217316A (en) * | 1977-05-14 | 1980-08-12 | Bayer Aktiengesellschaft | Immersed safety device and method for protection against back-fire in explosive gas steams |
| CN2242894Y (en) * | 1996-06-21 | 1996-12-18 | 包头市第四化工厂 | Self-control device for interlocking of feeding of acetylene-gas case with water-ring pump |
| CN2292803Y (en) * | 1997-05-16 | 1998-09-30 | 河南油田大正实业公司 | Gas sealing device for feed port of ethyne producer |
| WO1998059020A1 (en) * | 1997-06-23 | 1998-12-30 | James W. Bunger And Associates, Inc. | Integrated apparatus and process for high recovery of acetylene from the reaction of calcium carbide with water |
| CN1752189A (en) * | 2005-09-29 | 2006-03-29 | 宜宾天原股份有限公司 | Dry acetylene generator |
| CN201074227Y (en) * | 2007-07-05 | 2008-06-18 | 丁基祥 | PVC calcium carbide gas-phase charger |
-
2007
- 2007-07-05 CN CN2007100248670A patent/CN101338222B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217316A (en) * | 1977-05-14 | 1980-08-12 | Bayer Aktiengesellschaft | Immersed safety device and method for protection against back-fire in explosive gas steams |
| CN2242894Y (en) * | 1996-06-21 | 1996-12-18 | 包头市第四化工厂 | Self-control device for interlocking of feeding of acetylene-gas case with water-ring pump |
| CN2292803Y (en) * | 1997-05-16 | 1998-09-30 | 河南油田大正实业公司 | Gas sealing device for feed port of ethyne producer |
| WO1998059020A1 (en) * | 1997-06-23 | 1998-12-30 | James W. Bunger And Associates, Inc. | Integrated apparatus and process for high recovery of acetylene from the reaction of calcium carbide with water |
| CN1752189A (en) * | 2005-09-29 | 2006-03-29 | 宜宾天原股份有限公司 | Dry acetylene generator |
| CN201074227Y (en) * | 2007-07-05 | 2008-06-18 | 丁基祥 | PVC calcium carbide gas-phase charger |
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| Publication number | Publication date |
|---|---|
| CN101338222A (en) | 2009-01-07 |
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