CN210921440U - High-temperature combustible tar waste gas treatment explosion-proof system - Google Patents
High-temperature combustible tar waste gas treatment explosion-proof system Download PDFInfo
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- CN210921440U CN210921440U CN201921960880.1U CN201921960880U CN210921440U CN 210921440 U CN210921440 U CN 210921440U CN 201921960880 U CN201921960880 U CN 201921960880U CN 210921440 U CN210921440 U CN 210921440U
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Abstract
The utility model discloses a high-temperature combustible tar waste gas treatment explosion-proof system, which relates to the field of waste gas treatment and comprises a first pipeline, a cooling recoverer, a first bypass valve, a first combustible detector, a watertight valve, a regulating valve, a second bypass valve, a high-pressure fan, a second combustible detector and a combustion furnace; a second pipeline is connected between the cooling recoverer and the watertight valve, and the first bypass valve and the first combustible detector are arranged on the second pipeline; and a third pipeline is connected between the watertight valve and the combustion furnace, the regulating valve, the second bypass valve, the high-pressure fan and the second combustible detector are arranged on the third pipeline, the input end of the third pipeline is connected to the watertight valve, and the output end of the third pipeline is connected to the input port of the combustion furnace. The utility model discloses can effectively prevent the extreme condition of exploding of burning, ensure the safe operation of exhaust gas conduit and equipment.
Description
Technical Field
The utility model relates to a cooling of high temperature combustible tar gas that contains among the vacuum high temperature carbide furnace waste gas retrieves technical field, specifically says so a high temperature combustible tar exhaust-gas treatment explosion-proof system, can realize the safe and reliable burning of tar waste gas and handle in polyacrylonitrile carbon fiber manufacturing process.
Background
Polyacrylonitrile (PAN) based carbon fiber production is a process of continuously removing impurity elements (mainly H, N, O, K, Na), reducing defects, purifying and reforming carbon chains, and mainly comprises two processes of protofilament production and protofilament carbonization. The protofilament production process mainly comprises the working procedures of polymerization, defoaming, metering, spinning, traction, water washing, oiling, drying and filament collection and the like. The carbonization process mainly comprises the working procedures of filament unwinding, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, sizing drying, filament winding and the like. The process of removing impurity elements mainly comprises the working procedures of low-temperature carbonization and high-temperature carbonization, mainly comprises the steps of carrying out physical and chemical reactions and the like on polyacrylonitrile and additives such as alcohol, resin and the like in a vacuum carbonization furnace at the temperature of 1000-2000 ℃, converting impurities into gas to be discharged along with a vacuum pump, and carbonizing carbon elements to prepare carbon fibers.
During carbonization in a vacuum carbonization furnace, a large amount of gas (40-70% of the feeding weight) converted from impurities is discharged out of the carbonization furnace, the components of mixed gas (hereinafter referred to as tar waste gas) are very complex, C, H, O-bonded various compounds, K, Na compounds, extremely toxic cyanides and a mixture of partial solid which is sublimated under high-temperature vacuum are available.
Today, the environmental protection requirements are increasingly strict, the tar waste gas is not allowed to be directly discharged and is allowed to be discharged after being treated to reach the standard. At present, aiming at the high-temperature combustible oil fume waste gas with complex components, the mature and effective treatment processes comprise three types: one is a cooling recovery method, one is a direct combustion method, and the other is an oil fume purification method. However, the methods have low actual treatment efficiency, have great potential safety hazards and are difficult to popularize.
The utility model relates to a high temperature combustible tar waste gas administers clean system is the high-efficient clean system that cooling recovery method and combustion method combined together, nevertheless because the combustible substance of high boiling point, macromolecule in the waste gas can only be got rid of to the cooling recovery method, still has a large amount of combustible gas in the waste gas after the cooling is retrieved, and the back end burning treatment process has very big potential safety hazard, and combustion apparatus and pipeline have the risk of blasting.
SUMMERY OF THE UTILITY MODEL
To the problem among the prior art, the utility model provides a high temperature combustible tar exhaust-gas treatment explosion-proof system.
In order to achieve the purpose, the utility model discloses a following technical scheme realizes:
a high-temperature combustible tar waste gas treatment explosion-proof system comprises a first pipeline, a cooling recoverer, a first bypass valve, a first combustible detector, a watertight valve, an adjusting valve, a second bypass valve, a high-pressure fan, a second combustible detector and a combustion furnace; an air inlet is arranged on the lower shell of the cooling recoverer, an air outlet is arranged on the upper shell of the cooling recoverer, one end of the first pipeline is connected with a waste gas inlet, the other end of the first pipeline is connected with the air inlet, a second pipeline is connected between the cooling recoverer and the watertight valve, and the first bypass valve and the first combustible detector are arranged on the second pipeline; and a third pipeline is connected between the watertight valve and the combustion furnace, the regulating valve, the second bypass valve, the high-pressure fan and the second combustible detector are arranged on the third pipeline, the input end of the third pipeline is connected to the watertight valve, and the output end of the third pipeline is connected to the input port of the combustion furnace.
Furthermore, the first bypass valve is close to one end of the cooling recoverer, and the first combustible detector is close to one end of the watertight valve.
Furthermore, the watertight valve comprises a water tank, the water tank is filled with liquid water, and the output end of the second pipeline is positioned in the liquid water.
Furthermore, a fourth explosion venting opening is formed in the top of the water tank.
And furthermore, a first explosion venting port close to the cooling recoverer, a second explosion venting port close to the watertight valve, a third explosion venting port and a first flame arrester are arranged on the second pipeline.
Furthermore, a third pipeline close to the watertight valve is provided with a second flame arrester and a first one-way valve, and a third pipeline close to the combustion furnace is provided with a third flame arrester, a second one-way valve and a fifth explosion vent.
The utility model discloses following beneficial effect has: the utility model discloses an increased effective reliable detection and prevention module in the waste gas treatment system, guaranteed that combustible gas concentration is less than or equal to 4% back and get into and fire burning furnace in the waste gas, set up in each pipeline suitable position of waste gas simultaneously and let out the synergistic effect of 4 kinds of structural component of explosion mouth, spark arrester, check valve and watertight valve, can effectively prevent the extreme condition of exploding of burning, ensure the safe operation of waste gas pipeline and equipment.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
labeled as: 1. a carbonization furnace; 2. a cooling recoverer; 3. a first bypass valve; 4. a first flammability detector; 5. a watertight valve; 501. a water tank; 6. adjusting a valve; 7. a second bypass valve; 8. a high pressure fan; 9. a second flammability detector; 10. a combustion furnace; 11. a first conduit; 12. a second conduit; 13. a third pipeline; 14. a first explosion venting port; 15. a second explosion venting port; 16. a third explosion venting port; 17. a first flame arrestor; 18. a fourth explosion venting port; 19. a second flame arrestor; 20. a first check valve; 21. a third flame arrestor; 22. a second one-way valve; 23. and a fifth explosion venting port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or circuit connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
An explosion-proof system for treating high-temperature combustible tar waste gas is shown in figure 1, and the general structure is as follows:
the device comprises a cooling recoverer 2, a first bypass valve 3, a first combustible detector 4, a watertight valve 5, a regulating valve 6, a second bypass valve 7, a high-pressure fan 8, a second combustible detector 9 and a combustion furnace 10.
A rotary cooler (not shown) and a rotary catcher (not shown) for cooling the waste gas are arranged in the cooling recoverer 2, an air inlet (not shown) is arranged on a lower shell of the cooling recoverer 2, an air outlet (not shown) is arranged on an upper shell of the cooling recoverer 2, and the temperature of the waste gas from the cooling recoverer 2 is generally controlled to be less than or equal to 20 ℃;
in practical application, a large amount of impurities are converted into tar waste gas in the carbonization process of the carbonization furnace 1, the tar waste gas is output through a first pipeline 11, one end of the first pipeline 11 is connected with the output end of the carbonization furnace 1, and the other end of the first pipeline 11 is connected with the air inlet of the cooling recoverer 2;
a second pipeline 12 is connected between the cooling recoverer 2 and the watertight valve 5, a first bypass valve 3 and a first flammable detector 4 are installed on the second pipeline 12, the first bypass valve 3 is close to one end of the cooling recoverer 2, and the first flammable detector 4 is close to one end of the watertight valve 5; the watertight valve 5 comprises a water tank 501, the water tank 501 is filled with liquid water, and the output end of the second pipeline 12 is positioned in the liquid water;
a third pipeline 13 is connected between the watertight valve 5 and the combustion furnace 10, the regulating valve 6, a second bypass valve 7, a high pressure fan 8 and a second flammable detector 9 are sequentially arranged on the pipeline of the third pipeline 13 along the direction from the watertight valve 5 to the combustion furnace 10, the input end of the third pipeline 13 is connected to the upper part of the water tank 501, and the output end of the third pipeline 13 is connected to the input port of the combustion furnace 10.
In order to further improve the factor of safety of system's pipeline, reduce the risk hidden danger, the utility model discloses still make following optimization improvement in the system architecture:
a first explosion venting port 14 close to the cooling recoverer 2, a second explosion venting port 15 close to the watertight valve 5, a third explosion venting port 16 and a first flame arrester 17 are arranged on the second pipeline 12;
a fourth explosion venting port 18 is arranged at the top of the water tank 501;
a second flame arrester 19 and a first check valve 20 are arranged on the third pipeline 13 close to the watertight valve 5, and a third flame arrester 21, a second check valve 22 and a fifth explosion venting port 23 are arranged on the third pipeline 13 close to the combustion furnace 10.
The utility model discloses explosion-proof system of high temperature combustible tar exhaust-gas treatment's theory of operation as follows:
(1) a first flammable detector 4 and a second flammable detector 9 are respectively arranged on the first pipeline 11 and the second pipeline 12, and are further respectively arranged at the outlet of the cooling recoverer 2 and the inlet of the combustion furnace 10 for detecting the concentration of flammable gas in each pipeline;
(2) when the first combustible detector 4 detects that the concentration of the combustible gas in the pipeline is more than or equal to 4% (when the concentration of the combustible gas is more than or equal to 5%, the combustible gas is possibly exploded), the first bypass valve 3 acts to open, fresh air is blown in to dilute the combustible gas, and the concentration of the combustible gas is reduced;
(3) when the first bypass valve 3 acts to open and the concentration of the combustible gas in the pipeline is still greater than or equal to 4% as detected by the first combustible detector 4 after the fresh air is blown in, the second bypass valve 7 acts to open, and meanwhile, the high-pressure fan 8 improves the operating frequency and continuously blows in a large amount of fresh air to reduce the concentration of the combustible gas;
(4) after the step (3) lasts for 20 seconds, when the second combustible detector 9 detects that the concentration of the combustible gas in the corresponding pipeline is still more than or equal to 4%, the regulating valve 6 starts to act (the regulating valve 6 is in a fully-open state during normal operation), the opening angle is reduced, the gas flow is reduced, the content of the combustible gas in the pipeline is reduced, and the content of the combustible gas is less than or equal to 4% before the waste gas enters the combustion furnace 10;
(5) when the second combustible detector 9 detects that the concentration of combustible gas in the corresponding pipeline is less than or equal to 4%, the opening angle of the regulating valve 6 returns to the fully open state, the second bypass valve 7 is closed, and then the first bypass valve 3 is closed;
(6) the multiple explosion venting ports are arranged on each pipeline, so that the impact of the burst explosion phenomenon on the pipelines is avoided;
(7) fire-retardant valves and one-way valves are arranged at the inlet of the combustion furnace 10, the air inlet of the high-pressure fan 8 and the air inlet of the watertight valve 5, so that the main pipeline is prevented from being subjected to reverse combustion and explosion, and the reverse propagation of fire is blocked;
(8) the watertight valve 5 arranged at the front end of the air inlet of the high-pressure fan 8 can effectively avoid reverse burning explosion of the main pipeline and also can effectively block the reverse propagation of fire.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The high-temperature combustible tar waste gas treatment explosion-proof system is characterized by comprising a first pipeline, a cooling recoverer, a first bypass valve, a first combustible detector, a watertight valve, an adjusting valve, a second bypass valve, a high-pressure fan, a second combustible detector and a combustion furnace; an air inlet is arranged on the lower shell of the cooling recoverer, an air outlet is arranged on the upper shell of the cooling recoverer, one end of the first pipeline is connected with a waste gas inlet, the other end of the first pipeline is connected with the air inlet, a second pipeline is connected between the cooling recoverer and the watertight valve, and the first bypass valve and the first combustible detector are arranged on the second pipeline; and a third pipeline is connected between the watertight valve and the combustion furnace, the regulating valve, the second bypass valve, the high-pressure fan and the second combustible detector are arranged on the third pipeline, the input end of the third pipeline is connected to the watertight valve, and the output end of the third pipeline is connected to the input port of the combustion furnace.
2. The high-temperature combustible tar waste gas treatment explosion-proof system of claim 1, wherein the first bypass valve is near one end of the cooling recoverer, and the first combustible detector is near one end of the watertight valve.
3. The high-temperature combustible tar waste gas treatment explosion-proof system according to claim 1, wherein the watertight valve comprises a water tank filled with liquid water, and the output end of the second pipeline is located in the liquid water.
4. The high-temperature combustible tar waste gas treatment explosion-proof system according to claim 3, wherein a fourth explosion venting port is arranged at the top of the water tank.
5. The high-temperature combustible tar waste gas treatment explosion-proof system according to claim 1, wherein a first explosion venting port close to the cooling recoverer, a second explosion venting port close to the watertight valve, a third explosion venting port and a first flame arrester are arranged on the second pipeline.
6. The high-temperature combustible tar waste gas treatment explosion-proof system according to claim 1, wherein a second flame arrester and a first one-way valve are arranged on a third pipeline close to the watertight valve, and a third flame arrester, a second one-way valve and a fifth explosion venting port are arranged on a third pipeline close to the combustion furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960880.1U CN210921440U (en) | 2019-11-14 | 2019-11-14 | High-temperature combustible tar waste gas treatment explosion-proof system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960880.1U CN210921440U (en) | 2019-11-14 | 2019-11-14 | High-temperature combustible tar waste gas treatment explosion-proof system |
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| CN210921440U true CN210921440U (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864795A (en) * | 2021-09-22 | 2021-12-31 | 龙游超晟科技有限公司 | Organic waste gas treatment system capable of treating explosion limit |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864795A (en) * | 2021-09-22 | 2021-12-31 | 龙游超晟科技有限公司 | Organic waste gas treatment system capable of treating explosion limit |
| CN113864795B (en) * | 2021-09-22 | 2024-04-02 | 浙江超晟科技有限公司 | Organic waste gas treatment system for treating explosion limit |
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