CN104892343A - Process apparatus for recovering acetylene gas from waste sodium hypochlorite liquid - Google Patents
Process apparatus for recovering acetylene gas from waste sodium hypochlorite liquid Download PDFInfo
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- CN104892343A CN104892343A CN201510217018.1A CN201510217018A CN104892343A CN 104892343 A CN104892343 A CN 104892343A CN 201510217018 A CN201510217018 A CN 201510217018A CN 104892343 A CN104892343 A CN 104892343A
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Abstract
The invention relates to the technical field of polyvinyl chloride production technologies, and provides a process apparatus for recovering acetylene gas from a waste sodium hypochlorite liquid. The apparatus is characterized in that the waste sodium hypochlorite liquid containing the acetylene gas is connected with a flash evaporation tank through a pressure-reducing valve; the inlet of a water ring vacuum pump is connected with the top of the flash evaporation tank; an acetylene concentration detector is arranged on a connecting pipeline between the water ring vacuum pump and the flash evaporation tank; the inlet of a gas-liquid separator is connected with the outlet of the water ring vacuum pump, the gas phase outlet of the gas-liquid separator is connected with a gas storage pipeline and an evacuation pipeline respectively, the gas storage pipeline is provided with a first automatic switch valve, the evacuation pipeline is provided with a second automatic switch valve, and the first automatic switch valve and the second automatic switch valve are respectively in communication connection with the acetylene concentration detector; and a displacement gas pipeline is connected with the flash evaporation tank. The acetylene gas with a concentration worth recovery in the waste sodium hypochlorite liquid is selectively recovered in the invention, so the apparatus realizes economic recovery of the acetylene gas and no pollution to environment.
Description
Technical field
The present invention relates to Production of PVC Technology field, specifically provide a kind of useless time sodium liquid and reclaim acetylene gas process unit.
Background technology
In suspension type polyvinyl-chloride production technique, in order to reduce calcium carbide unit consumption, improving acetylene gas reclamation rate, utilizing the recycle device increasing useless time sodium liquid vacuum flash desorption acetylene gas, compiling DCS automatic control program, makes useless time sodium liquid reclaim acetylene gas process unit and realizes the control of DCS remote auto.
Acetylene cleaning compounding system is in operational process, and useless time sodium liquid produces continuously.In order to recycle useless time sodium liquid, reducing the discharge of waste water, useless time sodium liquid being delivered to the pond of open type, after adding chemicals treatment, by finally qualified waste water recycling to peace and quiet composite system.But be dissolved with acetylene in the useless time sodium liquid of conveying, the acetylene gas be dissolved in useless time sodium liquid can be disposed in air in wastewater treatment process, causes acetylene cleaning to prepare the deterioration of factory building surrounding environment, also loss acetylene gas.
Summary of the invention
(1) technical problem that will solve
The present invention is to solve when the useless time sodium liquid that the peace and quiet compounding system of acetylene from calcium carbide device produces is arranged outward, the acetylene gas dissolved in useless time sodium liquid just discharges in an atmosphere, make acetylene cleaning prepare factory building surrounding environment to worsen, also cause a part of acetylene gas to be consumed, economic benefit can not maximized problem.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of useless time sodium liquid and reclaiming acetylene gas process unit, comprising:
Flash tank, the useless time sodium liquid containing acetylene gas is connected with described flash tank by reducing valve, and the bottom of described flash tank is communicated with useless time sodium liquid discharge pipe;
Water ring vacuum pump, the entrance of described water ring vacuum pump is communicated with by the top of pipeline with described flash tank;
Concentration of acetylene detector, described concentration of acetylene detector is arranged on the connecting pipeline between described water ring vacuum pump and described flash tank;
Gas-liquid separator, the entrance of described gas-liquid separator is connected with described Water-ring vacuum pump outlet, the gaseous phase outlet of described gas-liquid separator is connected with gas storage pipeline and emptying pipeline respectively, described gas storage pipeline is provided with the first automatic switch valve, described emptying pipeline is provided with the second automatic switch valve, and described first automatic switch valve and the second automatic switch valve all communicate to connect with described concentration of acetylene detector; And
Displacement gas pipeline, described displacement gas pipeline is communicated with described flash tank, for injecting substitution gas in described flash tank.
Preferably, the water port of described gas-liquid separator is communicated with by the working fluid of pipeline with described water ring vacuum pump.
Preferably, the pipeline be communicated with the working fluid of described water ring vacuum pump in the water port of described gas-liquid separator is provided with water cooler.
Preferably, described water cooler is water cycle water cooler.
Preferably, described gas-liquid separator is connected with filling pipe.
Preferably, described substitution gas is nitrogen.
(3) beneficial effect
The useless time sodium liquid of one provided by the invention reclaims acetylene gas process unit, comprises flash tank, water ring vacuum pump, concentration of acetylene detector, gas-liquid separator and displacement gas pipeline; Useless time sodium liquid containing acetylene gas is connected with flash tank by reducing valve; The entrance of water ring vacuum pump is communicated with the top of flash tank by pipeline; Concentration of acetylene detector is arranged on the connecting pipeline between water ring vacuum pump and flash tank; The entrance of gas-liquid separator is connected with Water-ring vacuum pump outlet, the gaseous phase outlet of gas-liquid separator is connected with gas storage pipeline and emptying pipeline respectively, gas storage pipeline is provided with the first automatic switch valve, emptying pipeline is provided with the second automatic switch valve, and the first automatic switch valve and the second automatic switch valve all communicate to connect with concentration of acetylene detector; Displacement gas pipeline is communicated with flash tank.The present invention optionally will be worth the acetylene gas of the concentration reclaimed to reclaim in useless time sodium liquid, by be unworthy recovery and concentration lower acetylene gas discharge, the acetylene gas that concentration is lower also can not cause environmental pollution, thus accomplished that the economy of acetylene gas reclaims, do not pollute the environment again simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of useless sodium liquid recovery acetylene gas process unit of the embodiment of the present invention.
Reference numeral:
1, flash tank; 2, concentration of acetylene detector; 3, water ring vacuum pump; 4, water cooler; 5, gas-liquid separator; 6, nitrogen fill valve; 7, the first autocontrol switch valve; 8, the second automatic switch valve.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In describing the invention, except as otherwise noted, term " on ", D score, " top ", " bottom ", the orientation of the instruction such as " longitudinal direction " or state relation be based on orientation shown in the drawings or state relation, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the mechanism of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, particular case above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1, the useless time sodium liquid of the one that the embodiment of the present invention provides reclaims acetylene gas process unit, for in Production of PVC technique, reclaimed by the acetylene gas contained in useless time sodium liquid, this device comprises flash tank 1, water ring vacuum pump 3, concentration of acetylene detector 2, gas-liquid separator 5 and displacement gas pipeline; Useless time sodium liquid containing acetylene gas is connected with described flash tank 1 by reducing valve; The entrance of described water ring vacuum pump 3 is communicated with by the top of pipeline with described flash tank 1, and the bottom of flash tank is communicated with useless time sodium liquid discharge pipe; Described concentration of acetylene detector 2 is arranged on the connecting pipeline between described water ring vacuum pump 3 and described flash tank 1; The entrance of described gas-liquid separator 5 is connected with the outlet of described water ring vacuum pump 3, the gaseous phase outlet of described gas-liquid separator 5 is connected with gas storage pipeline and emptying pipeline respectively, described gas storage pipeline is provided with the first automatic switch control valve 7, described emptying pipeline is provided with the second automatic switch valve, and described first automatic switch valve and the second automatic switch control valve 8 all communicate to connect with described concentration of acetylene detector 2.
Wherein, described displacement gas pipeline is communicated with described flash tank 1, for injecting substitution gas in described flash tank 1, substitution gas can select harmless in air and that content is maximum inert nitrogen gas, particular by arranging nitrogen fill valve 6 to realize the injection of nitrogen on displacement gas pipeline.
The water port of described gas-liquid separator 5 is communicated with, for filling into working fluid in water ring vacuum pump 3 by the working fluid of pipeline with described water ring vacuum pump 3; In addition, described gas-liquid separator 5 is connected with filling pipe, for filling into the production water of consumption in enterprise's separator.
The pipeline that the water port of described gas-liquid separator 5 is communicated with the working fluid of described water ring vacuum pump 3 is provided with water cooler 4; Described water cooler 4, for being water cycle water cooler 4, carries out heat exchange by circulation upper hose and the water cycle looping back water pipe.
Working process:
Flash tank 1 takes out negative pressure by water ring vacuum pump 3, and the acetylene qi exhaustion be dissolved in flash tank in useless time sodium liquid is separated out and is delivered to water ring vacuum pump 3, the acetylene gas after overdraft is delivered to gas-liquid separator 5 and carries out gas-liquid separation.Along with steam separator longer working time, its internal work liquid liquid level can reduce gradually, and gas-liquid separator automatically supplements a part and produces water, ensures that pump can reach required technical requirements and performance index.
Concentration of acetylene detector 2 detect acetylene gas qualified after, first autocontrol switch valve 7 is opened, be delivered to gas holder etc. from the isolated acetylene gas of gas-liquid separator 5 gaseous phase outlet by under meter and reclaim recycling, as concentration of acetylene detector 2 detects that acetylene gas is defective, nitrogen fill valve 6 is automatically opened and is carried out filling nitrogen displacement to flash tank 1, second automatic switch valve 8 is opened simultaneously, and acetylene gas directly carries out emptying.
The present invention can in Production of PVC technique, optionally the acetylene gas that the concentration value in useless time sodium liquid must reclaim is reclaimed, by be unworthy recovery and concentration lower acetylene gas discharge, wherein, the harm of the acetylene gas that concentration is lower also can not cause environmental pollution, thus accomplished that the economy of acetylene gas reclaims, do not pollute the environment again simultaneously.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (6)
1. useless time sodium liquid reclaims an acetylene gas process unit, it is characterized in that, comprising:
Flash tank, the useless time sodium liquid containing acetylene gas is connected with described flash tank by reducing valve, and the bottom of described flash tank is communicated with useless time sodium liquid discharge pipe;
Water ring vacuum pump, the entrance of described water ring vacuum pump is communicated with by the top of pipeline with described flash tank;
Concentration of acetylene detector, described concentration of acetylene detector is arranged on the connecting pipeline between described water ring vacuum pump and described flash tank;
Gas-liquid separator, the entrance of described gas-liquid separator is connected with described Water-ring vacuum pump outlet, the gaseous phase outlet of described gas-liquid separator is connected with gas storage pipeline and emptying pipeline respectively, described gas storage pipeline is provided with the first automatic switch valve, described emptying pipeline is provided with the second automatic switch valve, and described first automatic switch valve and the second automatic switch valve all communicate to connect with described concentration of acetylene detector; And
Displacement gas pipeline, described displacement gas pipeline is communicated with described flash tank, for injecting substitution gas in described flash tank.
2. useless time sodium liquid according to claim 1 reclaims acetylene gas process unit, and it is characterized in that, the water port of described gas-liquid separator is communicated with by the working fluid of pipeline with described water ring vacuum pump.
3. useless time sodium liquid according to claim 2 reclaims acetylene gas process unit, it is characterized in that, the pipeline that the water port of described gas-liquid separator is communicated with the working fluid of described water ring vacuum pump is provided with water cooler.
4. useless time sodium liquid according to claim 3 reclaims acetylene gas process unit, and it is characterized in that, described water cooler is water cycle water cooler.
5. the useless time sodium liquid according to any one of claim 2 to 4 reclaims acetylene gas process unit, and it is characterized in that, described gas-liquid separator is connected with filling pipe.
6. useless time sodium liquid according to claim 1 reclaims acetylene gas process unit, and it is characterized in that, described substitution gas is nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217018.1A CN104892343A (en) | 2015-04-30 | 2015-04-30 | Process apparatus for recovering acetylene gas from waste sodium hypochlorite liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217018.1A CN104892343A (en) | 2015-04-30 | 2015-04-30 | Process apparatus for recovering acetylene gas from waste sodium hypochlorite liquid |
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| CN104892343A true CN104892343A (en) | 2015-09-09 |
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| CN201510217018.1A Pending CN104892343A (en) | 2015-04-30 | 2015-04-30 | Process apparatus for recovering acetylene gas from waste sodium hypochlorite liquid |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07119179B2 (en) * | 1992-03-16 | 1995-12-20 | 北関東ミウラ株式会社 | Purification method of acetylene gas |
| CN101525264A (en) * | 2009-03-24 | 2009-09-09 | 内蒙古君正化工有限责任公司 | Method for recycling sodium hypochlorite purifying liquid used for purifying acetylene gas |
| CN104230630A (en) * | 2014-09-12 | 2014-12-24 | 新疆中泰化学股份有限公司 | Acetylene recovery device and method for recovering acetylene from waste sodium hypochlorite solution |
| CN204625506U (en) * | 2015-04-30 | 2015-09-09 | 鄂尔多斯市君正能源化工有限公司 | Useless time sodium liquid reclaims acetylene gas process unit |
-
2015
- 2015-04-30 CN CN201510217018.1A patent/CN104892343A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07119179B2 (en) * | 1992-03-16 | 1995-12-20 | 北関東ミウラ株式会社 | Purification method of acetylene gas |
| CN101525264A (en) * | 2009-03-24 | 2009-09-09 | 内蒙古君正化工有限责任公司 | Method for recycling sodium hypochlorite purifying liquid used for purifying acetylene gas |
| CN104230630A (en) * | 2014-09-12 | 2014-12-24 | 新疆中泰化学股份有限公司 | Acetylene recovery device and method for recovering acetylene from waste sodium hypochlorite solution |
| CN204625506U (en) * | 2015-04-30 | 2015-09-09 | 鄂尔多斯市君正能源化工有限公司 | Useless time sodium liquid reclaims acetylene gas process unit |
Non-Patent Citations (1)
| Title |
|---|
| 陈传国等: "废次氯酸钠中乙炔的闪蒸回收及废液回用复配次氯酸钠", 《聚氯乙烯》, vol. 42, no. 2, 28 February 2014 (2014-02-28), pages 36 - 37 * |
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Application publication date: 20150909 |
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