CN105085148A - Acetylene production process - Google Patents
Acetylene production process Download PDFInfo
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- CN105085148A CN105085148A CN201410191428.9A CN201410191428A CN105085148A CN 105085148 A CN105085148 A CN 105085148A CN 201410191428 A CN201410191428 A CN 201410191428A CN 105085148 A CN105085148 A CN 105085148A
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Abstract
The invention discloses a preparation method for acetylene gas. The method comprises: reacting calcium carbide with water in a generator to generate crude acetylene, performing gas-liquid separation, storing crude acetylene in a gas cabinet, enabling crude acetylene in the gas cabinet to pass through a purification tower and a neutralizing tower to form refined acetylene gas, removing moisture from refined acetylene gas, and pressurizing refined acetylene gas in an acetylene compressor; and removing lubrication oil and moisture in the pressurized high-pressure acetylene gas through a high-pressure oil separator and high-pressure dryers, and feeding the acetylene gas to an acetylene filling grate through a flashback arrestor. According to the method, calcium carbide is crudely ground only and nitrogen replacement is not required during charging, so that the investment is low and the operation is convenient; and a plurality of acetylene gas purification apparatuses are arranged, so that impurities in the acetylene gas can be well removed and the acetylene gas with relatively high purity can be prepared. In addition, the acetylene gas is dried by adopting the high-pressure dryers, a drying process is simple and effective, waste residues, waste water and waste acid are hardly generated in the drying process, the cost is low, and the dehydration effect is good.
Description
Technical field:
The invention belongs to chemical field, more specifically relate to a kind of production technique of acetylene.
Background technology:
Acetylene character is active, of many uses, is the main raw material producing the products such as vinylchlorid, trieline, vinyl cyanide, Methane Carboxylic Acid ester, neoprene.As the method for suitability for industrialized production acetylene, the method that calcium carbide (CaC2) and water are reacted employs a very long time, and damp process and drying process are well-known.Because damp process needs the water of more than use 10 equivalent to react relative to calcium carbide, the process of the mixture of byproduct white lime and water is comparatively numerous and diverse, and therefore nowadays drying process becomes main flow.
Chinese patent 200710013526.3 discloses a kind of technique of producing acetylene gas by dry method, raw material is power and water stone flour, its weight proportion is 1.1 ~ 1.9: 1, water is sprayed on the calcium carbide powder in carbide-feed generator with mist state, there is hydrolysis reaction, generation acetylene gas, the method technical process is more complicated.
At present, the technique that domestic acetylene drying dewaters mainly contains the techniques such as lyophilization, alternating temperature Adsorbing drying by pressure variation, vitriol oil drying; Siccative many employings solid caustic soda, calcium chloride, the vitriol oil, molecular sieve etc., water removal effect is mostly at more than 100ppm, and cost is high, dehydrating effect is bad, easily produces waste residue, waste water, spent acid in drying process, also acetylene explosive combustion accident easily occurs.
Summary of the invention:
For the problems referred to above, the object of the present invention is to provide a kind of simple to operate and dry acetylene production process can be carried out to acetylene safely and effectively.
The present invention is achieved by the following technical solutions.
A production technique for acetylene, is characterized in that, mainly comprises the steps:
(1) with nitrogen, the air in all production units of acetylene and pipeline is replaced, detect each operation Exhaust Gas oxygen level, reinforced when time after oxygen level < 3%;
(2) be that 200mm or following calcium carbide elevator go-cart are pushed into carbide-feed generator charging opening place by granularity, manually add in producer;
(3) acetylene gas that produces of reaction, enters successively and refines in envelope, gas holder, peace and quiet tower, neutralizing tower, Safety water seal and low pressure oil water separator just against the current;
(4) by after refining acetylene gas removing moisture, enter in acetylene compressor and pressurize; Acetylene gas after pressurization through high-pressure oil/water separator and high pressure moisture eliminator, is finally filled with and is equipped with in the acetylene cylinder of acetone successively.
As this technical scheme further, the temperature in described carbide-feed generator is 68-72 DEG C, and pressure-controlling is at 0.005-0.01MPa.
As this technical scheme further, the purification agent in described peace and quiet tower is clorox, and in neutralizing tower, neutralization reagent is NaOH solution.
As this technical scheme further, described high pressure moisture eliminator quantity is at least 2.
As this technical scheme further, described acetylene gas is dry through high pressure, is dried to water content and is equal to or less than 1g/m
3c
2h
2.
Beneficial effect: calcium carbide coarse reduction of the present invention, without nitrogen replacement time reinforced, less investment, easy to operate, and the present invention is provided with the device of multiple tracks purification acetylene gas, can remove the impurity in acetylene gas well, the acetylene gas that obtained purity is higher.In addition, what the present invention adopted is that multiple tracks high pressure moisture eliminator carries out drying to acetylene gas, and drying process is simply effective, and produce waste residue, waste water, spent acid hardly in drying process, cost is low and dehydrating effect good.
Accompanying drawing illustrates:
Fig. 1 is the process flow sheet of the present embodiment.
Embodiment:
Below in conjunction with specific embodiment, the present invention will be further described.
This flow process adopts calcium carbide to enter ability of swimming low-pressure acetylene generator.Be characterized in that calcium carbide can drop into carbide-feed generator without over grind, use calcium carbide granularity at 200mm or following.
Calcium carbide is slightly walked pulverizing, and the calcium carbide granularity after pulverizing is at about 200mm.During initial start-up, with nitrogen, the air entered in all devices such as ability of swimming low-pressure acetylene generator and pipeline is replaced, in the device of each operation during expellant gas oxygen level < 3%, reinforced production.Be that 200mm or following calcium carbide elevator go-cart are pushed into carbide-feed generator charging opening place by granularity, manually add in producer, calcium carbide reacts and produces acetylene entering ability of swimming low-pressure acetylene generator and water.Entering temperature in ability of swimming low-pressure acetylene generator controls at about 70 DEG C by recirculated water, and liquid level is maintained by the overflow of overflow port, and pressure-controlling is at about 0.008MPa.The pulp water of carbide-feed generator discharge enters slag bath by scum pipe, and the supernatant liquor of clarification squeezes into elevated tank through pump, recycles as carbide-feed generator.
Entering the acetylene gas produced in ability of swimming low-pressure acetylene generator, enter in a peace and quiet tower and two peace and quiet towers through positive water seal, gas holder, purification agent in peace and quiet tower is clorox, its effect is the impurity such as phosphuret-(t)ed hydrogen, hydrogen sulfide in removing acetylene gas, when clorox concentration drops to 0.02%, drain into useless clear pond to use for producer, wastewater utilization.Through peace and quiet tower, acetylene gas enters in neutralizing tower, and the neutralization solution in neutralizing tower is 14%NaOH solution, the acid mist that its effect is residual with acetylene gas in being.When concentration of lye is down to less than 3% or NaCO
3when content is greater than 10%, drain into slag bath supernatant, be mixed in useless clear Chi Chu, also make generation water.
Sulphur, phosphorus impurities in removing acetylene gas, the acetylene gas after purification, through Safety water seal, low pressure oil water separator, enters acetylene compressor pressurization, is added to by acetylene gas and be less than 2.5MPa; High pressure acetylene gas after pressurization, through high pressure oil separator by lubricating oil removing in acetylene gas, then enter 3 road high pressure moisture eliminators, thus farthest removed by the moisture in acetylene gas, the water content through the acetylene gas of 3 road high pressure moisture eliminator dryings is less than 1g/m
3c
2h
2, deliver to acetylene loading row finally by flash-back preventer.Acetylene loading framed bent has the qualified acetylene cylinder got ready and fill tank acetone, pressurization acetylene gas is filled with in acetylene cylinder, is dissolved in acetone.The acetylene cylinder filled, after leaving standstill 8 hours, dispatches from the factory after the assay was approved.Deliver to acetylene to charge framed bent and fill bottle, through treating pin after the assay was approved.
Claims (5)
1. a production technique for acetylene, is characterized in that, mainly comprises the steps:
(1) with nitrogen, the air in all production units of acetylene and pipeline is replaced, detect each operation Exhaust Gas oxygen level, reinforced when time after oxygen level < 3%;
(2) be that the calcium carbide elevator go-cart of below 200mm is pushed into carbide-feed generator charging opening place by granularity, manually add in producer;
(3) acetylene gas of reaction generation, enters successively in positive water seal, gas holder, peace and quiet tower, neutralizing tower, Safety water seal and low pressure oil water separator and refines;
(4) by after refining acetylene gas removing moisture, enter in acetylene compressor and pressurize; Acetylene gas after pressurization through high-pressure oil/water separator and high pressure moisture eliminator, is finally filled with and is equipped with in the acetylene cylinder of acetone successively.
2. the production technique of a kind of acetylene according to claim 1, is characterized in that, the temperature in described carbide-feed generator is 60-75 DEG C, and pressure-controlling is at 0.005-0.01MPa.
3. the production technique of a kind of acetylene according to claim 1, is characterized in that, the purification agent in described peace and quiet tower is clorox, and in neutralizing tower, neutralization reagent is NaOH solution.
4. the production technique of a kind of acetylene according to claim 1, is characterized in that, described high pressure moisture eliminator quantity is at least 2.
5. the production technique of a kind of acetylene according to claim 1, is characterized in that, described acetylene gas is dry through high pressure, is dried to water content and is equal to or less than 1g/m
3c
2h
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410191428.9A CN105085148A (en) | 2014-05-07 | 2014-05-07 | Acetylene production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410191428.9A CN105085148A (en) | 2014-05-07 | 2014-05-07 | Acetylene production process |
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| CN105085148A true CN105085148A (en) | 2015-11-25 |
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| CN201410191428.9A Pending CN105085148A (en) | 2014-05-07 | 2014-05-07 | Acetylene production process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129830A (en) * | 2017-04-26 | 2017-09-05 | 安徽华塑股份有限公司 | A kind of process of efficient calcium carbide method acetylene production |
| CN107937029A (en) * | 2017-12-22 | 2018-04-20 | 中国科学院上海高等研究院 | A kind of method and system of coal base calcium carbide acetylene |
| CN107983925A (en) * | 2017-10-25 | 2018-05-04 | 江苏亨通精工金属材料有限公司 | A kind of direct casting utter misery stripper apparatus and its release method |
| CN109400437A (en) * | 2018-12-25 | 2019-03-01 | 内蒙古蒙维科技有限公司 | A kind of device and method reducing moisture in vinyl acetate synthesis raw material acetylene gas |
| CN110437878A (en) * | 2019-08-05 | 2019-11-12 | 昆明鹏翼达气体产品有限公司 | A kind of acetylene production process process automation interlock control system and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202400987U (en) * | 2011-12-08 | 2012-08-29 | 青海宜化化工有限责任公司 | Cleaning system of acetylene gas |
| CN202766480U (en) * | 2012-04-01 | 2013-03-06 | 通州宏仁气体有限公司 | Acetylene production system |
| CN203488980U (en) * | 2013-08-15 | 2014-03-19 | 苏州金宏气体股份有限公司 | Device for filling high-purity acetylene and industrial acetylene simultaneously |
-
2014
- 2014-05-07 CN CN201410191428.9A patent/CN105085148A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202400987U (en) * | 2011-12-08 | 2012-08-29 | 青海宜化化工有限责任公司 | Cleaning system of acetylene gas |
| CN202766480U (en) * | 2012-04-01 | 2013-03-06 | 通州宏仁气体有限公司 | Acetylene production system |
| CN203488980U (en) * | 2013-08-15 | 2014-03-19 | 苏州金宏气体股份有限公司 | Device for filling high-purity acetylene and industrial acetylene simultaneously |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107129830A (en) * | 2017-04-26 | 2017-09-05 | 安徽华塑股份有限公司 | A kind of process of efficient calcium carbide method acetylene production |
| CN107129830B (en) * | 2017-04-26 | 2021-03-23 | 安徽华塑股份有限公司 | Process method for producing acetylene by high-efficiency calcium carbide method |
| CN107983925A (en) * | 2017-10-25 | 2018-05-04 | 江苏亨通精工金属材料有限公司 | A kind of direct casting utter misery stripper apparatus and its release method |
| CN107937029A (en) * | 2017-12-22 | 2018-04-20 | 中国科学院上海高等研究院 | A kind of method and system of coal base calcium carbide acetylene |
| CN109400437A (en) * | 2018-12-25 | 2019-03-01 | 内蒙古蒙维科技有限公司 | A kind of device and method reducing moisture in vinyl acetate synthesis raw material acetylene gas |
| CN109400437B (en) * | 2018-12-25 | 2023-09-22 | 内蒙古蒙维科技有限公司 | Device and method for reducing water content in acetylene gas of vinyl acetate synthesis raw material |
| CN110437878A (en) * | 2019-08-05 | 2019-11-12 | 昆明鹏翼达气体产品有限公司 | A kind of acetylene production process process automation interlock control system and control method |
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