CN102847401A - System and method for recycling carbide slag in dry acetylene production - Google Patents
System and method for recycling carbide slag in dry acetylene production Download PDFInfo
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Abstract
A method for recycling carbide slag in dry acetylene production comprises the following steps: successively starting an induced draft fan, a first Roots blower, a second Roots blower to provide directional airflow for the equipment; starting a tapping screw to continuously output carbide slag of a predetermined amount at a preset rotation speed into a first airflow conveying pipe, so as to introduce the carbide slag with the airflow into a classification tank; settling large particle impurities with large proportion to a crude carbide slag collecting device by using relation of airflow speed and proportion of large particle impurities; sending fine carbide slag with small proportion to a second airflow conveying pipe, so as to introduce the carbide slag with small proportion into a fine carbide slag collecting device with the airflow; conducting a slag removal operation on the airflow entering the fine carbide slag collecting device by using a dust collector at the top of a bin; and discharging airflow with dust removed by the induced draft fan airflow in the upper air. The method can realize safe and pollution-free recovery of the carbide slag. The invention also provides a system for recycling carbide in slag dry acetylene production.
Description
Technical field:
The present invention relates to the carbide slag recovery technology field in the acetylene production process, carbide slag recovery system and method during particularly a kind of dry acetylene is produced.
Background technology:
Present domestic carbide slag is carried, employing open type or semienclosed helical feed, and scraper-type is carried, bucket elevator is carried, pipe crimping type is carried, because these induction systems are not all sealed, causes the pollution of objectionable impurities gas and the dust pollutions such as on-the-spot acetylene.Simultaneously, can there be potential safety hazard in the on-the-spot objectionable impurities gas such as acetylene.
Summary of the invention:
In view of this, be necessary to provide a kind of dry acetylene that adopts closed air-flow to carry carbide slag produce in carbide slag recovery system and method.
Carbide slag recovery system during a kind of dry acetylene is produced comprises the screw rod of slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber.The defeated air port of the first roots blower is communicated with the air inlet of an end of the first air delivery tube, the gas outlet of the other end of the first air delivery tube is communicated with the air intake vent of classification tank, offer feeding mouth on the tube wall of the first air delivery tube, the feeding mouth of the first air delivery tube is communicated with the slag notch of the screw rod of slagging tap.The slag-drip opening of classification tank is communicated with thick carbide slag gathering-device, and the air outlet of classification tank is communicated with the air inlet of an end of the second air delivery tube, and the gas outlet of the other end of the second air delivery tube is communicated with thin carbide slag gathering-device.The defeated air port of the second roots blower is communicated with the air inlet of thick carbide slag gathering-device.Roof scrubber is arranged on the top of thin carbide slag gathering-device, and is communicated with thin carbide slag gathering-device, and roof scrubber also is connected with air-introduced machine.The first air delivery tube and the second air delivery tube are parallel to each other, and the second air delivery tube is positioned at the side top of the first air delivery tube.
Carbide slag recovery method during a kind of dry acetylene is produced, the carbide slag recovery method is applied in carbide slag recovery system in the dry acetylene production that comprises the screw rod of slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber in this dry acetylene production, and the method comprises the steps:
Start successively air-introduced machine, the first roots blower, the second roots blower, think that the first air delivery tube, the second air delivery tube, classification tank, thin carbide slag gathering-device, roof scrubber provide windstream;
Start the screw rod of slagging tap, the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume, so that carbide slag enters the classification tank with the air-flow in the first air delivery tube;
In the classification tank, utilize air velocity and large granular impurity proportion relation, heavy large granular impurity is settled down in the thick carbide slag gathering-device, utilize the air-flow thin carbide slag that proportion is little to be delivered to the second air delivery tube from the classification tank, so that the little thin carbide slag of proportion enters thin carbide slag gathering-device with the air-flow in the second air delivery tube;
Utilize roof scrubber to entering the air-flow dust removal operation that contains thin carbide slag in the thin carbide slag gathering-device, and by the air-flow of air-introduced machine after the high altitude discharge dedusting.
Carbide slag recovery method during carbide slag recovery system and dry acetylene were produced during above-mentioned dry acetylene was produced, the screw rod of will slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, the classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber is communicated with formation one sealing flow delivery systems, by starting successively air-introduced machine, the first roots blower, the second roots blower, think the first air delivery tube, the second air delivery tube, the classification tank, thin carbide slag gathering-device, roof scrubber provides windstream, then start the screw rod of slagging tap, the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume, so that carbide slag enters the classification tank with the air-flow in the first air delivery tube, in the classification tank, utilize air velocity and large granular impurity proportion relation, heavy large granular impurity is settled down in the thick carbide slag gathering-device, utilize the air-flow thin carbide slag that proportion is little to be delivered to the second air delivery tube from the classification tank, so that the little thin carbide slag of proportion enters thin carbide slag gathering-device with the air-flow in the second air delivery tube and utilizes roof scrubber to entering the air-flow dust removal operation that contains thin carbide slag in the thin carbide slag gathering-device, and by the air-flow of air-introduced machine after the high altitude discharge dedusting, and then the safety of realization carbide slag, pollution-free recovery.
Description of drawings:
Fig. 1 is carbide slag recovery system structural representation during the dry acetylene of a preferred embodiments is produced.
Fig. 2 is the flow chart of carbide slag recovery method during the dry acetylene of a preferred embodiments is produced.
Among the figure: carbide slag recovery method step S301～S304 during carbide slag recovery system 100, the screw rod 101 of slagging tap, the first roots blower 102, the second roots blower 103, the first air delivery tube 104, the second air delivery tube 105, air-introduced machine 106, classification tank 107, thick carbide slag gathering-device 108, thin carbide slag gathering-device 109, roof scrubber 120, compressed air delivery device 122, dry acetylene are produced in the dry acetylene production
The specific embodiment:
Present embodiment employing air-flow dilute phase low-pressure delivery mode realizes the recovery to carbide slag in the dry acetylene production, please referring to Fig. 1, carbide slag recovery system 100 comprises the screw rod 101 of slagging tap, the first roots blower 102, the second roots blower 103, the first air delivery tube 104, the second air delivery tube 105, air-introduced machine 106, classification tank 107, thick carbide slag gathering-device 108, thin carbide slag gathering-device 109, roof scrubber 120 in the dry acetylene production.
The defeated air port of the first roots blower 102 is communicated with the air inlet of an end of the first air delivery tube 104, the gas outlet of the other end of the first air delivery tube 104 is communicated with the air intake vent of classification tank 107, offer feeding mouth on the tube wall of the first air delivery tube 104, the feeding mouth of the first air delivery tube 104 is communicated with the slag notch of the screw rod 101 of slagging tap.The slag-drip opening of classification tank 107 is communicated with thick carbide slag gathering-device 108, and the air outlet of classification tank 107 is communicated with the air inlet of an end of the second air delivery tube 105, and the gas outlet of the other end of the second air delivery tube 105 is communicated with thin carbide slag gathering-device 109.The defeated air port of the second roots blower 103 is communicated with the air inlet of thick carbide slag gathering-device 108.Roof scrubber 120 is arranged on the top of thin carbide slag gathering-device 109, and is communicated with thin carbide slag gathering-device 109, and roof scrubber 120 also is connected with air-introduced machine 106.The first air delivery tube 104 and the second air delivery tube 105 are parallel to each other, and the second air delivery tube 105 is positioned at the side top of the first air delivery tube 104.Wherein, be lined with earthenware or carborundum tube in the first air delivery tube 104, the second air delivery tube 105, so reduce to be mixed with the air-flow of carbide slag to the wearing and tearing of the first air delivery tube 104, the second air delivery tube 105; Slag tap screw rod 101, the first air delivery tube 104, the second air delivery tube 105, classification tank 107, thick carbide slag gathering-device 108, thin carbide slag gathering-device 109 controlled connection between each element by the pneumatic knife gate valve each other, and the air outlet of the first roots blower 102, the second roots blower 103 arranges between Pneumatic butterfly valve, roof scrubber 120 and the air-introduced machine 106 the Pneumatic single-seat control valve is set.Slag tap screw rod 101 for having the self-cleaning type twin-screw of compression ratio, avoid the higher Air Reverse of malleation to scurry in the acetylene generating system.In the present embodiment, carbide slag recovery system 100 also comprises central control station in the dry acetylene production, central control station and the screw rod 101 of slagging tap, the first roots blower 102, the second roots blower 103, air-introduced machine 106, classification tank 107, thick carbide slag gathering-device 108, thin carbide slag gathering-device 109, roof scrubber 120 and pneumatic knife gate valve, Pneumatic butterfly valve, the Pneumatic single-seat control valve is electrically connected, according to default programme-control said elements work, for example, control pneumatic knife gate valve, Pneumatic butterfly valve, the switching of Pneumatic single-seat control valve, control the screw rod 101 of slagging tap, the first roots blower 102, the second roots blower 103, air-introduced machine 106 starts, and detects the first roots blower 102, the second roots blower 103, air-introduced machine 106, classification tank 107, thick carbide slag gathering-device 108, thin carbide slag gathering-device 109, roof scrubber 120 and pneumatic knife gate valve, Pneumatic butterfly valve, the ruuning situation of Pneumatic single-seat control valve.
Be equipped with for the ultrasonic measuring instrument of measuring material level at the top of thin carbide slag gathering-device 109, when detecting material level and reach high charge level, the ultrasonic measuring instrument produces the first Report alarming information, to remind the Field Force that the carbide slag in the thin carbide slag gathering-device 109 is transported, when the ultrasonic measuring instrument detects material level and reaches minimum material level, for fear of the drawing mechanism negative pressure air leakage, or malleation leakage dirt, produce the Secondary Report alarming information, namely to remind the Field Force to stop discharging; Roof scrubber 120 is bag hose, in order to prevent that roof scrubber 120 surperficial attached dust quantitys from too much affecting the dust removing effects of roof scrubber 120, be provided with compressed air delivery device 122 at roof scrubber 120 tops, compressed air delivery device 122 regularly carries compressed air to roof scrubber 120, impacts dedusting to adopt compressed air.
Utilize when carbide slag recovery system 100 reclaims carbide slag in the dry acetylene production, carbide slag enters in the first air delivery tube 104 of inner lining with silicon carbide, enters classification tank 107.By regulating the first air delivery tube 104 length, the size of the caliber in the classification tank 107 changes the air velocity that enters in the classification tank 107, in classification tank 107 interior the first roots blower 102 and the second roots blower 103 mixed air velocities and the large granular impurity proportion relations utilized, heavy large granular impurity is settled down to thick carbide slag gathering-device 108, the thin carbide slag that proportion is little is delivered to the second air delivery tube 105 with the first roots blower 102 and the second roots blower 103 mixed air-flows from classification tank 107, so that the little thin carbide slag of proportion enters thin carbide slag gathering-device 109 with the air-flow in the second air delivery tube 105, enter and guarantee that thin carbide slag also is deposited in the thin carbide slag gathering-device 109 after thin carbide slag gathering-device 109 interior air velocities reach predetermined speed, 120 pairs of roof scrubbers enter the tails dedusting that contains thin carbide slag in the thin carbide slag gathering-device, and by the air-flow of air-introduced machine 106 after the high altitude discharge dedusting.It should be noted that, when carbide slag recovery system 100 reclaims carbide slag in utilizing dry acetylene production, the screw rod 101 interior carbide slags that guarantee to slag tap can not be interrupted and will after thick carbide slag gathering-device 108, thin carbide slag gathering-device 109 are collected the carbide slag of scheduled volume, in time the carbide slag of collection to be discharged.
Carbide slag recovery method flow chart in please producing referring to dry acetylene shown in Figure 2, the carbide slag recovery method is applied in carbide slag recovery system in the dry acetylene production that comprises the screw rod of slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber in this dry acetylene production, and the method comprises the steps:
Step S301 starts air-introduced machine, the first roots blower, the second roots blower successively, thinks that the first air delivery tube, the second air delivery tube, classification tank, thin carbide slag gathering-device, roof scrubber provide windstream.Wherein, guarantee that the pressure of windstream and acetylene system pressure are close, for example, acetylene system pressure 0.03MPa makes windstream near 0.03MPa by the transmission range that windstream is set; Before carrying out " starting successively air-introduced machine, the first roots blower, the second roots blower; think that the first air delivery tube, the second air delivery tube, classification tank, thin carbide slag gathering-device, roof scrubber provide windstream " step, also carry out following steps: open the second air delivery tube to the valve between the thin calcium carbide feed bin, open the classification tank to the valve between the thick carbide slag gathering-device, close the discharging opening valve of thick carbide slag gathering-device, start the valve between roof scrubber and the air-introduced machine; And open the first roots blower, the second roots blower cooling water inlet valve.
Step S302 starts the screw rod of slagging tap, and the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume, so that carbide slag enters the classification tank with the air-flow in the first air delivery tube.Wherein, before carrying out " the startup screw rod of slagging tap; the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume; so that carbide slag enters the classification tank with the air-flow in the first air delivery tube " step, also carry out following steps: open the valve of slagging tap between screw rod and the first air delivery tube.
Step S303, in the classification tank, utilize air velocity and large granular impurity proportion relation, heavy large granular impurity is settled down in the thick carbide slag gathering-device, utilize the air-flow thin carbide slag that proportion is little to be delivered to the second air delivery tube from the classification tank, so that the little thin carbide slag of proportion enters thin carbide slag gathering-device with the air-flow in the second air delivery tube.For example, in acetylene occured, responseless large granular impurity had calcium carbonate, ferrosilicon and a small amount of calcium carbide, because particle diameter greater than 1 millimeter, is easy to separate less than 100 purpose calcium hydroxide powder dusts with particle diameter, is specially:
Solid particle, the not sedimentation if be in suspended state, its minimum wind speed is called floating velocity (Vt):
G is acceleration of gravity in the formula, is 9.81m/s
2;
D is solid grain size (m);
Because in air-flow was carried, Re belonged to turbulent flow greater than 1000,
Desirable 0.9988.
Although calcium carbide approaches with lime proportion in air-flow is carried, about 2.2kg/L, particle diameter difference, and the ferrosilicon proportion in the carbide slag is 5.29kg/L a small amount of ratio 6.35kg/L that weighs is arranged, and have magnetic, but content is about 5% of ferrosilicon.
If EAT is 50 ℃, air quantity is 3986.7m3/h, and air specific weight is 1.2799kg/m3
1mm particle diameter carbide slag then is if proportion is 2.2, then
1mm proportion is 5290kg/m
3Its sinking speed of ferrosilicon be:
Air-flow reaches 17.2m/s in the gas speed of the sweep of the first air delivery tube, the second air delivery tube, so even the 4.7mm ferrosilicon all can blow away, but as long as at expansion chamber control 5.62m/s wind speed, just be easy to sedimentation separation out greater than the 1mm ferrosilicon.
Step S304 utilizes roof scrubber to entering the air-flow dust removal operation that contains thin carbide slag in the thin carbide slag gathering-device, and by the air-flow of air-introduced machine after the high altitude discharge dedusting.In addition, in order to prevent that the attached dust quantity in roof scrubber surface from too much affecting the dust removing effects of roof scrubber, carry out " utilize roof scrubber to entering the air-flow dust removal operation that contains thin carbide slag in the thin carbide slag gathering-device; and by the air-flow of air-introduced machine after the high altitude discharge dedusting " during step, also carry out simultaneously following steps: when the timing time value reaches the Preset Time value, utilization is arranged on the compressed air delivery device at roof scrubber top and carries compressed air to roof scrubber, impacts dedusting to adopt compressed air; The ultrasonic measuring instrument that utilization is arranged on thin carbide slag gathering-device top detects the interior carbide slag material level of thin carbide slag gathering-device, when detecting material level and reach high charge level, the ultrasonic measuring instrument produces the first Report alarming information, to remind the Field Force that the carbide slag in the thin carbide slag gathering-device is transported, when the ultrasonic measuring instrument detects material level and reaches minimum material level, for fear of the drawing mechanism negative pressure air leakage, or malleation leakage dirt, produce the Secondary Report alarming information, stop discharging to remind the Field Force.
Claims (10)
1. carbide slag recovery system during a dry acetylene is produced is characterized in that: the carbide slag recovery system comprises the screw rod of slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber in the dry acetylene production; The defeated air port of the first roots blower is communicated with the air inlet of an end of the first air delivery tube, the gas outlet of the other end of the first air delivery tube is communicated with the air intake vent of classification tank, offer feeding mouth on the tube wall of the first air delivery tube, the feeding mouth of the first air delivery tube is communicated with the slag notch of the screw rod of slagging tap; The slag-drip opening of classification tank is communicated with thick carbide slag gathering-device, and the air outlet of classification tank is communicated with the air inlet of an end of the second air delivery tube, and the gas outlet of the other end of the second air delivery tube is communicated with thin carbide slag gathering-device; The defeated air port of the second roots blower is communicated with the air inlet of thick carbide slag gathering-device; Roof scrubber is arranged on the top of thin carbide slag gathering-device, and is communicated with thin carbide slag gathering-device, and roof scrubber also is connected with air-introduced machine; The first air delivery tube and the second air delivery tube are parallel to each other, and the second air delivery tube is positioned at the side top of the first air delivery tube.
2. carbide slag recovery system during dry acetylene according to claim 1 is produced, it is characterized in that: the screw rod of slagging tap, the first air delivery tube, the second air delivery tube, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device are controlled connection between each element by the pneumatic knife gate valve each other, and the air outlet of the first roots blower, the second roots blower arranges the Pneumatic single-seat control valve is set between Pneumatic butterfly valve, roof scrubber and the air-introduced machine.
3. carbide slag recovery system during dry acetylene according to claim 2 is produced, it is characterized in that: the carbide slag recovery system also comprises central control station in the dry acetylene production, central control station is electrically connected with the screw rod of slagging tap, the first roots blower, the second roots blower, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber and pneumatic knife gate valve, Pneumatic butterfly valve, Pneumatic single-seat control valve, according to default programme-control said elements work.
4. carbide slag recovery system during dry acetylene according to claim 1 is produced, it is characterized in that: be lined with earthenware or carborundum tube in the first air delivery tube, the second air delivery tube, to reduce being mixed with the air-flow of carbide slag to the wearing and tearing of the first air delivery tube, the second air delivery tube.
5. the method for utilizing dicyandiamide sludge as material, carbide slag to produce lime according to claim 1, it is characterized in that: the screw rod of slagging tap is the self-cleaning type twin-screw with compression ratio.
6. the method for utilizing dicyandiamide sludge as material, carbide slag to produce lime according to claim 1, it is characterized in that: be equipped with for the ultrasonic measuring instrument of measuring material level at the top of thin carbide slag gathering-device, when detecting material level and reach high charge level, the ultrasonic measuring instrument produces the first Report alarming information, to remind the Field Force that the carbide slag in the thin carbide slag gathering-device is transported, when the ultrasonic measuring instrument detects material level and reaches minimum material level, produce the Secondary Report alarming information, namely to remind the Field Force to stop discharging.
7. the method for utilizing dicyandiamide sludge as material, carbide slag to produce lime according to claim 1, it is characterized in that: roof scrubber is bag hose, be provided with the compressed air delivery device at the roof scrubber top, the compressed air delivery device regularly carries compressed air to roof scrubber, impacts dedusting to adopt compressed air.
8. carbide slag recovery method during a dry acetylene is produced, the carbide slag recovery method is applied in carbide slag recovery system in the dry acetylene production that comprises the screw rod of slagging tap, the first roots blower, the second roots blower, the first air delivery tube, the second air delivery tube, air-introduced machine, classification tank, thick carbide slag gathering-device, thin carbide slag gathering-device, roof scrubber in this dry acetylene production, comprises the steps:
Start successively air-introduced machine, the first roots blower, the second roots blower, think that the first air delivery tube, the second air delivery tube, classification tank, thin carbide slag gathering-device, roof scrubber provide windstream;
Start the screw rod of slagging tap, the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume, so that carbide slag enters the classification tank with the air-flow in the first air delivery tube;
In the classification tank, utilize air velocity and large granular impurity proportion relation, heavy large granular impurity is settled down in the thick carbide slag gathering-device, utilize the air-flow thin carbide slag that proportion is little to be delivered to the second air delivery tube from the classification tank, so that the little thin carbide slag of proportion enters thin carbide slag gathering-device with the air-flow in the second air delivery tube;
Utilize roof scrubber to entering the air-flow dust removal operation that contains thin carbide slag in the thin carbide slag gathering-device, and by the air-flow of air-introduced machine after the high altitude discharge dedusting.
9. carbide slag recovery method during dry acetylene according to claim 8 is produced, it is characterized in that: " start successively air-introduced machine; the first roots blower; the second roots blower; think the first air delivery tube; the second air delivery tube; the classification tank in execution, thin carbide slag gathering-device, roof scrubber provides windstream " before the step; also carry out following steps: open the second air delivery tube to the valve between the thin calcium carbide feed bin; open the classification tank to the valve between the thick carbide slag gathering-device; close the discharging opening valve of thick carbide slag gathering-device, start the valve between roof scrubber and the air-introduced machine; And open the first roots blower, the second roots blower cooling water inlet valve; Before carrying out " the startup screw rod of slagging tap; the screw rod of slagging tap enters the first air delivery tube according to the carbide slag of desired speed continuous wave output scheduled volume; so that carbide slag enters the classification tank with the air-flow in the first air delivery tube " step, also carry out following steps: open the valve of slagging tap between screw rod and the first air delivery tube.
10. carbide slag recovery method during dry acetylene according to claim 8 is produced is characterized in that: further comprising the steps of:
When the timing time value reaches the Preset Time value, utilize the compressed air delivery device that is arranged on the roof scrubber top to carry compressed air to roof scrubber, impact dedusting to adopt compressed air;
The ultrasonic measuring instrument that utilization is arranged on thin carbide slag gathering-device top detects the interior carbide slag material level of thin carbide slag gathering-device, when detecting material level and reach high charge level, the ultrasonic measuring instrument produces the first Report alarming information, to remind the Field Force that the carbide slag in the thin carbide slag gathering-device is transported, when the ultrasonic measuring instrument detects material level and reaches minimum material level, produce the Secondary Report alarming information, stop discharging to remind the Field Force.
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| CN108530252A (en) * | 2018-06-08 | 2018-09-14 | 陕西煤业化工技术研究院有限责任公司 | A kind of processing dry method carbide slag realizes the device and technique of acetylene gas recycling |
| CN108530252B (en) * | 2018-06-08 | 2024-01-23 | 陕西煤业化工技术研究院有限责任公司 | Device and process for realizing acetylene gas recovery by treating dry-method carbide slag |
| CN110296429A (en) * | 2019-08-07 | 2019-10-01 | 北京首创环境科技有限公司 | Sodium bicarbonate in a kind of processing of dangerous waste incineration flue gas grinds conveying device |
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