CN104760957A - Exhaust gas recovery system of silicon carbide smelting technology - Google Patents
Exhaust gas recovery system of silicon carbide smelting technology Download PDFInfo
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- CN104760957A CN104760957A CN201510029854.7A CN201510029854A CN104760957A CN 104760957 A CN104760957 A CN 104760957A CN 201510029854 A CN201510029854 A CN 201510029854A CN 104760957 A CN104760957 A CN 104760957A
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Abstract
The invention relates to an exhaust gas recovery system of a silicon carbide smelting technology. The exhaust gas recovery system comprises branched pipe exhaust gas recovery systems which are used for filtering and collecting exhaust gas from branched pipes and detecting an oxygen concentration, a total pipe exhaust gas recovery system which is used for collecting exhaust gas collected by the branched pipe exhaust gas recovery systems, detecting an oxygen concentration of the exhaust gas and controlling exhaust gas high-altitude discharge or introduction into a gas conveying pipe, and a gas conveying system which is used for collecting exhaust gas transmitted by the gas conveying pipe, filtering the exhaust gas, detecting a gas concentration and conveying the filtered gas into a gas application unit. The exhaust gas recovery system realizes real time monitoring and control of an oxygen concentration of exhaust gas, prevents explosion caused by mixing of a lot of carbon monoxide and oxygen, guarantees worker safety, prevents property loss, and realizes recycle of a lot of carbon monoxide exhaust gas produced by a silicon carbide smelting technology and conveying of the gas to gas application units.
Description
Technical field
The present invention relates to gas recovery system, be specifically related to a kind of for detecting and reclaiming the gas recovery system of silicon carbide smelting technique.
Background technology
From the American Acheson beginning in 1891 with linear pattern slot type resistance furnace silicon carbide smelting, the history so far over more than 100 year, there is family more than 200 of silicon carbide smelting enterprise in China, yearly capacity more than 220 ten thousand tons.Silicon carbide processing Zhi Sha micro mist manufacturing enterprise is mainly distributed in the provinces such as Henan, Shandong, Jiangsu, Jilin, Heilungkiang.
Silicon carbide (SiC) is that raw material is formed by resistance furnace pyrotic smelting with quartz sand, coal.Do not burn due to coal but smelted by resistance furnace heating, so produce a large amount of carbon monoxide, basic concentration reaches about 70%, external main enterprises achieves to close substantially smelts, and China's silicon carbide smelting is all almost open smelting, carbon monoxide is all in line, result in atmospheric pollution and personnel's injury.Carbon monoxide enter human body after can and blood in oxyphorase combination, because carbon monoxide and Hb BC hemoglobin binding capacity are far better than the binding ability of oxygen and oxyphorase, and then enablely sharply to reduce with the amount of hemoglobin of combination with oxygen, thus cause body tissue to occur anoxic, cause human body death by suffocation.So the sector realizes closed smelting positive, carbon monoxide waste gas all reclaims, and reaches energy-conservation, reduces discharging, the requirement of environmental protection.But in the process reclaimed, the oxygen mix in a large amount of carbon monoxide and air, as not having corresponding detection, control method, so very easily blasting, causing loss of life and personal injury and property damage.
Summary of the invention
The object of this invention is to provide a kind of gas recovery system of silicon carbide smelting technique, Real-Time Monitoring also controls the concentration of oxygen in waste gas, prevent a large amount of carbon monoxide and oxygen mix and blast, a large amount of carbon monoxide produced in the silicon carbide smelting of recycling simultaneously technique.
The object of the invention is to be achieved through the following technical solutions:
A gas recovery system for silicon carbide smelting technique, is characterized in that, comprising: be in charge of gas recovery system, for filtering and collecting the waste gas of each branch line, detects oxygen concentration simultaneously; House steward's gas recovery system, concentrates the waste gas being in charge of gas recovery system collection described in each, by the concentration of oxygen in detected gas, controls waste gas high altitude discharge or enters gas pipe line; Gas delivery system, collects the waste gas of described gas pipe line transmission, then filters and is transported to by induction pipe after detected gas concentration and use gas unit.
Further, described gas recovery system of being in charge of comprises the gas-distributing pipe connecting silicon carbide resistance furnace, described gas-distributing pipe connects recovery valve, described recovery valve door connects fine filter by tracheae, described fine filter connects the first electrically operated valve and air water separator respectively by tracheae, described air water separator connects automatic drain device and off-gas pump respectively by tracheae, and described off-gas pump connects oxygen analyser by tracheae, and described first electrically operated valve is fixedly connected with gas main.
Further, spark arrester is provided with between described fine filter and air water separator.
Further, house steward's gas recovery system comprises some described gas mains, described in every bar, gas main all connects the second electrically operated valve, described second electrically operated valve connects vacuum fan by tracheae, described vacuum fan connects the 3rd electrically operated valve, the 4th electrically operated valve and magnetic valve respectively by tracheae, described 3rd electrically operated valve connecting gas transmission pipe road, described 4th electrically operated valve connects high altitude discharge mouth by tracheae, and described magnetic valve connects gas-detecting device and described gas pipe line respectively by tracheae.
Further, the first pressure transmitter is provided with between described second electrically operated valve and vacuum fan.
Further, temperature sensor is equipped with before described 3rd electrically operated valve and the 4th electrically operated valve.
Further, described gas pipe line is provided with gas meter.
Further, described gas delivery system comprises the 5th electrically operated valve connecting described gas pipe line, described 5th electrically operated valve connects spray column by tracheae, the first bleeder is provided with between described 5th electrically operated valve and described spray column, described spray column connects the second gas-detecting device by tracheae, described second gas-detecting device connects booster fan by tracheae, and described booster fan connects the second bleeder, gas flow sensor, the second pressure transmitter and described induction pipe successively by tracheae.
Further, described spray column and the second gas-detecting device are equipped with bypass air flue, and described bypass air flue is equipped with by-pass valve.
Beneficial effect of the present invention is: Real-Time Monitoring of the present invention also controls the concentration of oxygen in waste gas, prevent a large amount of carbon monoxide and oxygen mix and the situation of blasting, safety and the property damage of workman are ensured, the a large amount of carbon monoxide waste gas simultaneously produced in second stage employ silicon carbide smelting technique, and this gas is transported to each gas department.
Accompanying drawing explanation
With reference to the accompanying drawings the present invention is described in further detail below.
Fig. 1 is the pipeline schematic diagram being in charge of gas recovery system described in the embodiment of the present invention;
Fig. 2 is the pipeline schematic diagram of house steward's gas recovery system described in the embodiment of the present invention;
Fig. 3 is the pipeline schematic diagram of gas delivery system described in the embodiment of the present invention.
In figure:
1, silicon carbide resistance furnace; 2, valve is reclaimed; 3, fine filter; 4, the first electrically operated valve; 5, spark arrester; 6, air water separator; 7, automatic drain device; 8, off-gas pump; 9, oxygen analyser; 10, segmental bronchus; 11, concentrator; 12, gas main; 13, the second electrically operated valve; 14, vacuum fan; 15, the first pressure transmitter; 16, the 3rd electrically operated valve; 17, gas pipe line; 18, the 4th electrically operated valve; 19, high altitude discharge mouth; 20, magnetic valve; 21, the first gas-detecting device; 22, gas meter; 23, temperature sensor; 24, the 5th electrically operated valve; 25, spray column; 26, the second gas-detecting device; 27, by-pass valve; 28, the first bleeder; 29, the first booster fan; 30, the second booster fan; 31, the second bleeder; 32, gas flow sensor; 33, the second pressure transmitter; 34, induction pipe.
Embodiment
As Figure 1-3, the gas recovery system of a kind of silicon carbide smelting technique described in the embodiment of the present invention, comprises and is in charge of gas recovery system, for filtering and collecting the waste gas of each branch line, detects oxygen concentration simultaneously; House steward's gas recovery system, concentrates the waste gas being in charge of gas recovery system collection described in each, by the concentration of oxygen in detected gas, controls waste gas high altitude discharge or enters gas pipe line 17; Gas delivery system, collects the waste gas of described gas pipe line 17 transmission, then filters and is transported to by induction pipe 34 after detected gas concentration and use gas unit.
As shown in Figure 1, described gas recovery system of being in charge of comprises the recovery valve 2 connecting silicon carbide resistance furnace 1 venting port, described recovery valve 2 connects fine filter 3 by tracheae, for the dust-filtering of gas, described fine filter 3 connects the first electrically operated valve 4 and spark arrester 5 respectively by tracheae, described spark arrester 5 is for preventing spreading of pipeline flame, play the effect of proterctive equipment, described spark arrester 5 connects air water separator 6 by tracheae, described air water separator 6 connects automatic drain device 7 and off-gas pump 8 respectively by tracheae, described waste gas takes off liquid by air water separator 6, then the liquid accumulated is discharged by automatic drain device 7, described off-gas pump 8 connects by tracheae the concentration that oxygen analyser 9 detects oxygen, described first electrically operated valve 4 connects segmental bronchus 10, some described segmental bronchuses 10 all connect gas main 12 by concentrator 11.
As shown in Figure 2, house steward's gas recovery system comprises some described gas mains 12, gas main 12 described in every bar all connects the second electrically operated valve 13, described second electrically operated valve 13 connects vacuum fan 14 by tracheae, the first pressure transmitter 15 is provided with between described second electrically operated valve 13 and vacuum fan 14, described vacuum fan 14 connects the 3rd electrically operated valve 16 respectively by tracheae, 4th electrically operated valve 18 and magnetic valve 20, described 3rd electrically operated valve 16 connecting gas transmission pipe road 17, described 4th electrically operated valve 18 connects high altitude discharge mouth 19 by tracheae, described magnetic valve 20 connects the first gas-detecting device 21 and described gas pipe line 17 respectively by tracheae, described gas pipe line 17 is provided with gas meter 22, being equipped with temperature sensor 23 before described 3rd electrically operated valve 16 and the 4th electrically operated valve 18, for detecting tracheal strips temperature, if temperature is too high easily make gaseous detonation, causing danger.
CO, O in described first gas-detecting device 21 testing pipes
2, CH
4, H
2the content of four kinds of gases, thus the concentration drawing oxygen, when oxygen concn higher than 4% time, frequency transformer vacuum fan 14 reduces rotating speed; Change rotating speed after, oxygen concn still higher than 4% time, described 4th electrically operated valve 18 is opened, and will exceed standard gas high altitude discharge; When oxygen concn lower than 4% time, the 3rd electrically operated valve 16 is opened, and acceptable gas enters gas pipe line 17.
As shown in Figure 3, described gas delivery system comprises the 5th electrically operated valve 2418 connecting described gas pipe line 17, described 5th electrically operated valve 24 connects spray column 25 by tracheae, for Purge gas, the rear and front end of described spray column 25 is equipped with valve, for the protection of with control spray column 25, described spray column 25 and the second gas-detecting device 26 are equipped with bypass air flue, described bypass air flue is equipped with by-pass valve 27, when hypertonia in main tracheae, by-pass valve 27 is opened, alleviate main intratracheal pressure, play the effect protecting main tracheae; Be provided with the first bleeder 28 between described 5th electrically operated valve 24 and described spray column 25, for carrying out overpressure protection to upstream device, higher to pressure, flow velocity faster gas diffuses, and bleeder should arrange spark arrester 5.
Described spray column 25 connects the second gas-detecting device 26 by tracheae, the rear and front end of described second gas-detecting device 26 is equipped with valve, the second gas-detecting device 26 is entered for controlling gas, described second gas-detecting device 26 connects booster fan by tracheae, described booster fan is by frequency conversion tank Systematical control, described booster fan connects the second bleeder 31 successively by tracheae, gas flow sensor 32, second pressure transmitter 33 and described induction pipe 34, gas is after blower fan pressurization, pressure is 5KP, then gas enters heat power plant by induction pipe 34 or other use gas place, when pipeline pressure is increased to 7KP, think and to break down with gas place, so frequency conversion tank system reduces the rotating speed of booster fan, to ensure safety.
Real-Time Monitoring of the present invention also controls the concentration of oxygen in waste gas, prevent a large amount of carbon monoxide and oxygen mix and the situation of blasting, safety and the property damage of workman are ensured, the a large amount of carbon monoxide waste gas simultaneously produced in second stage employ silicon carbide smelting technique, and this gas is transported to each gas department, while Real-Time Monitoring overpressure, when pipeline pressure is too high, by reducing booster fan rotating speed, realize reducing manifold pressure, to ensure the safety of whole system.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (9)
1. a gas recovery system for silicon carbide smelting technique, is characterized in that, comprising:
Be in charge of gas recovery system, for filtering and collecting the waste gas of each branch line, detect oxygen concentration simultaneously;
House steward's gas recovery system, concentrates the waste gas being in charge of gas recovery system collection described in each, by the concentration of oxygen in detected gas, controls waste gas high altitude discharge or enters gas pipe line;
Gas delivery system, collects the waste gas of described gas pipe line transmission, then filters and is transported to by induction pipe after detected gas concentration and use gas unit.
2. gas recovery system according to claim 1, it is characterized in that: described in be in charge of gas recovery system and comprise the gas-distributing pipe connecting silicon carbide resistance furnace, described gas-distributing pipe connects recovery valve, described recovery valve door connects fine filter by tracheae, described fine filter connects the first electrically operated valve and air water separator respectively by tracheae, described air water separator connects automatic drain device and off-gas pump respectively by tracheae, described off-gas pump connects oxygen analyser by tracheae, and described first electrically operated valve is fixedly connected with gas main.
3. gas recovery system according to claim 2, is characterized in that: be provided with spark arrester between described fine filter and air water separator.
4. gas recovery system according to claim 1, it is characterized in that: house steward's gas recovery system comprises some described gas mains, described in every bar, gas main all connects the second electrically operated valve, described second electrically operated valve connects vacuum fan by tracheae, described vacuum fan connects the 3rd electrically operated valve, the 4th electrically operated valve and magnetic valve respectively by tracheae, described 3rd electrically operated valve connecting gas transmission pipe road, described 4th electrically operated valve connects high altitude discharge mouth by tracheae, and described magnetic valve connects gas-detecting device and described gas pipe line respectively by tracheae.
5. gas recovery system according to claim 4, is characterized in that: be provided with the first pressure transmitter between described second electrically operated valve and vacuum fan.
6. gas recovery system according to claim 4, is characterized in that: be equipped with temperature sensor before described 3rd electrically operated valve and the 4th electrically operated valve.
7. gas recovery system according to claim 4, is characterized in that: described gas pipe line is provided with gas meter.
8. gas recovery system according to claim 1, it is characterized in that: described gas delivery system comprises the 5th electrically operated valve connecting described gas pipe line, described 5th electrically operated valve connects spray column by tracheae, the first bleeder is provided with between described 5th electrically operated valve and described spray column, described spray column connects the second gas-detecting device by tracheae, described second gas-detecting device connects booster fan by tracheae, and described booster fan connects the second bleeder, gas flow sensor, the second pressure transmitter and described induction pipe successively by tracheae.
9. gas recovery system according to claim 8, is characterized in that: described spray column and the second gas-detecting device are equipped with bypass air flue, and described bypass air flue is equipped with by-pass valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510029854.7A CN104760957B (en) | 2015-01-21 | 2015-01-21 | The gas recovery system of silicon carbide smelting technique |
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| CN201510029854.7A CN104760957B (en) | 2015-01-21 | 2015-01-21 | The gas recovery system of silicon carbide smelting technique |
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| CN104760957A true CN104760957A (en) | 2015-07-08 |
| CN104760957B CN104760957B (en) | 2017-03-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499954A (en) * | 2016-11-03 | 2017-03-15 | 北京航天试验技术研究所 | A kind of hydrogen manages safe venting system concentratedly |
| CN109231213A (en) * | 2018-08-28 | 2019-01-18 | 平罗县滨河碳化硅制品有限公司 | Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas and recovery method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61232213A (en) * | 1985-04-08 | 1986-10-16 | Bridgestone Corp | Production of silicon carbide |
| CN101337673A (en) * | 2007-07-05 | 2009-01-07 | 贾玉东 | Refining furnace of silicon carbide for recovering smelting waste gases |
| CN102557030A (en) * | 2011-12-09 | 2012-07-11 | 邵水源 | Tail gas collecting system of silicon carbide smelting furnace |
| CN104129787A (en) * | 2014-08-18 | 2014-11-05 | 宋克纯 | Silicon carbide smelting equipment applied to tail gas recovery |
-
2015
- 2015-01-21 CN CN201510029854.7A patent/CN104760957B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61232213A (en) * | 1985-04-08 | 1986-10-16 | Bridgestone Corp | Production of silicon carbide |
| CN101337673A (en) * | 2007-07-05 | 2009-01-07 | 贾玉东 | Refining furnace of silicon carbide for recovering smelting waste gases |
| CN102557030A (en) * | 2011-12-09 | 2012-07-11 | 邵水源 | Tail gas collecting system of silicon carbide smelting furnace |
| CN104129787A (en) * | 2014-08-18 | 2014-11-05 | 宋克纯 | Silicon carbide smelting equipment applied to tail gas recovery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499954A (en) * | 2016-11-03 | 2017-03-15 | 北京航天试验技术研究所 | A kind of hydrogen manages safe venting system concentratedly |
| CN109231213A (en) * | 2018-08-28 | 2019-01-18 | 平罗县滨河碳化硅制品有限公司 | Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas and recovery method |
| CN109231213B (en) * | 2018-08-28 | 2023-07-25 | 平罗县滨河碳化硅制品有限公司 | Environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery device and recovery method |
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| CN104760957B (en) | 2017-03-08 |
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