CN212456891U - Tail gas treatment system for multiple polyester production lines - Google Patents
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- CN212456891U CN212456891U CN202020495429.3U CN202020495429U CN212456891U CN 212456891 U CN212456891 U CN 212456891U CN 202020495429 U CN202020495429 U CN 202020495429U CN 212456891 U CN212456891 U CN 212456891U
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Abstract
The utility model provides a tail gas treatment system for many production lines of polyester. The utility model collects the tail gas of the same production equipment close to a plurality of production lines on the tail gas pipeline, installs the main valve, and adds a buffer tank and a fan; a buffer tank and a fan are added to tail gas generated by the dispersed production line; a fan is added to tail gas generated by dispersed equipment or facilities; and conveying the collected tail gas to a liquid separating tank, and conveying the tail gas to a heating medium furnace for incineration. The utility model discloses a tail gas processing system and method can effectively realize the safe collection of tail gas and handle of many production of polyester, dispersion production line, dispersion equipment or facility, make polyester site organic matter concentration (VOC) less than or equal to 20mg/L simultaneously, and the polyester site environment can safety protection.
Description
Technical Field
The utility model relates to a tail gas collection handles technical field in the polyester production technology, and specifically speaking relates to a tail gas treatment system for many production lines of polyester.
Background
The polyester production is to take terephthalic acid and ethylene glycol as raw materials, and polyester chips can be obtained through esterification and polycondensation reactions. In the production process of polyester chips, tail gas is generated in a catalyst modulation supply, an esterification separation tower, a vacuum liquid ring pump, a polymerization glycol hot well, a waste water tank and a waste water tank, the tail gas discharged in an unorganized mode is Volatile Organic Compounds (VOC), the environment is polluted to a certain extent, and the concentration of the tail gas in the air is less than 200g/L according to national regulations.
Chinese patent CN206152567U discloses a tail gas recovery and treatment device, which comprises a pretreatment kettle, a condenser, a vapor-liquid separator, a recovery tank, and a tail gas absorption tower, wherein the condenser is connected to the downstream of the outlet of the pretreatment kettle, the vapor-liquid separator is connected to the downstream of the outlet of the condenser, the recovery tank is connected to the downstream of the lower outlet of the vapor-liquid separator, and the tail gas absorption tower is connected to the downstream of the upper outlet of the vapor-liquid separator. Before tail gas gets into the tail gas absorption tower, through condenser and vapour and liquid separator with the material condensation separation of waiting to retrieve in the tail gas, not only can realize the recycle of tail gas, greatly reduced moreover the work load of tail gas absorption tower effectively improves the rate of recovery and the treatment rate of tail gas. The utility model discloses requirement 1, a tail gas recovery and treatment device, a pretreatment kettle, used for collecting and temporarily storing tail gas; the condenser is connected to the downstream of the outlet of the pretreatment kettle and is used for condensing substances to be recovered in the tail gas into liquid; the gas-liquid separator is connected with the downstream of the outlet of the condenser and is used for separating liquid in the tail gas; a recovery tank connected to the lower outlet of the vapor-liquid separator downstream for collecting the separated liquid; and the tail gas absorption tower is connected to the lower part of the upper outlet of the gas-liquid separator and is used for finally treating the tail gas. 2. The tail gas recovering and treating device includes one cooler and one purifier between the pre-treating kettle and the condenser, and the cooler has inlet communicated with the pre-treating kettle and inlet communicated with the cooler.
Chinese patent CN202229196U a polyester waste gas safety incineration processing system, including the waste gas collecting pipe, the waste gas collecting pipe has connected gradually fan, first solenoid valve, ball valve, second solenoid valve through the pipeline, and the heat medium stove is connected to the second solenoid valve, and the second solenoid valve has safety interlock control circuit through the line connection. The waste gas collecting pipe is a pipeline for collecting and collecting pipelines of the polyester device which respectively discharge low-concentration waste gas. The stainless steel ball valve is arranged at the inlet of the electromagnetic valve, and when the electromagnetic valve breaks down, the waste gas can be controlled to enter or be closed in a mode of manually opening and closing the stainless steel ball valve. The safety interlocking control loop comprises a heat medium furnace starting signal device and a heat medium furnace stopping signal device, and the heat medium furnace starting signal device and the heat medium furnace stopping signal device are communicated with the heat medium furnace. The safety interlock control circuit comprises a second electromagnetic valve which instantly acts to close when a stop signal is sent by a stop signal device of the heat medium furnace on the heat medium furnace, and instantly acts to open when a start signal is sent by a start signal device of the heat medium furnace on the heat medium furnace. The second electromagnetic valve is connected with a hearth negative pressure alarm signal device through a circuit, and the hearth negative pressure alarm signal device is communicated with the heating medium furnace. If the heat medium furnace belongs to a coal-fired heat medium furnace, when the hearth negative pressure alarm signal device sends an alarm signal, the second electromagnetic valve immediately acts and closes, and when the heat medium furnace starting signal device sends a starting signal and the hearth negative pressure alarm signal device does not send an alarm signal, the second electromagnetic valve can act and open. Be connected with first spark arrester on the pipeline between exhaust gas collecting pipe and the fan, can effectually prevent that the interior flame of stove from scurrying into the exhaust gas pipeline that has inflammable and explosive hazardous gas, avoid the occurence of failure. The pipeline between the second electromagnetic valve and the heat medium furnace is connected with a second flame arrester, and when the heat medium furnace has serious accidents such as fire and explosion, the heat medium furnace can be isolated from a waste gas system, so that the accident can be prevented from spreading and expanding. The second flame arrestor needs to be as close as possible to the heat medium furnace. The fan and the first electromagnetic valve form a control loop through a line. When the fan stop signal takes place, first solenoid valve moves promptly and closes, and when fan start signal takes place, first solenoid valve can move and open. The connecting points among the ball valve, the second electromagnetic valve and the second flame arrester are directly connected by flanges, so that the dangerous parts of the system can be reduced to the maximum extent. The utility model discloses a claim 1 polyester waste gas safety incineration processing system, including the waste gas collecting pipe, the waste gas collecting pipe has connected gradually fan, first solenoid valve, ball valve, second solenoid valve through the pipeline, and the heat medium stove is connected to the second solenoid valve, and the second solenoid valve has safety interlock control circuit through the line connection. 2. The safety interlocking control loop comprises a heat medium furnace starting signal device and a heat medium furnace stopping signal device, and the heat medium furnace starting signal device and the heat medium furnace stopping signal device are communicated with the heat medium furnace. 3. The second electromagnetic valve is connected with a hearth negative pressure alarm signal device through a circuit, and the hearth negative pressure alarm signal device is communicated with the heating medium furnace. 4. A first flame arrester is connected on a pipeline between the waste gas collecting pipe and the fan. 5. And a second flame arrester is connected on a pipeline between the second electromagnetic valve and the heat medium furnace. 6. The fan and the first electromagnetic valve form a control loop through a line. 7. The fan is an explosion-proof fan. 8. The connecting points among the ball valve, the second electromagnetic valve and the second flame arrester are all directly connected by flanges.
In summary, the polyester tail gas collection and treatment method mainly comprises the steps of condensing by a condenser, separating by a separator, discharging after absorbing by a tail gas absorption tower or directly collecting the tail gas by a pipeline, protecting by a fan, a first electromagnetic valve and a second electromagnetic valve and then sending the tail gas to a heat medium furnace for incineration treatment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tail gas treatment system and method for many production lines of polyester. The utility model discloses a tail gas processing system and method can effectively realize that the tail gas safety of the close many production of polyester, dispersion production line, dispersion equipment or facility is collected and is handled, makes polyester site organic matter concentration (VOC) less than or equal to 20mg/L simultaneously, and polyester site environment can the safety protection.
The technical scheme of the utility model is specifically as follows:
the utility model provides a tail gas treatment system for many production lines of polyester, this tail gas treatment system, include: the system comprises a first type tail gas discharge device, a main valve 1, a buffer tank 1, a fan 1, a second type tail gas discharge device, a buffer tank 2, a fan 2, a third type tail gas discharge device, a fan 3, a liquid separating tank and an incineration device;
the first type tail gas discharge device is sequentially connected with a main valve 1, a buffer tank 1 and a fan 1 through a tail gas pipeline 1, the fan 1 is connected with the liquid separation tank, and the fan 1 is used for extracting and collecting first type tail gas generated by the first type tail gas discharge device through the buffer tank 1 and the main valve 1 and conveying the collected first type tail gas to the liquid separation tank;
the second type tail gas discharge device is sequentially connected with a buffer tank 2 and a fan 2 through a tail gas pipeline 2, the fan 2 is connected with the liquid separation tank, and the fan 2 is used for extracting and collecting second type tail gas generated by the second type tail gas discharge device through the buffer tank 2 and conveying the collected second type tail gas to the liquid separation tank;
the third type tail gas discharge device is connected with a fan 3 through a tail gas pipeline 3, the fan 3 is connected with the liquid separation tank, and the fan 3 is used for extracting and collecting third type tail gas generated by the third type tail gas discharge device and conveying the collected third type tail gas to the liquid separation tank;
the liquid separation tank is connected with the incineration device, and the incineration device is used for carrying out incineration treatment on tail gas in the liquid separation tank.
Further, the second type of exhaust emission device is an exhaust emission device generated by a scattered production line.
Further, the third type of tail gas discharge device is waste water pool tail gas. The third type of tail gas emission device is a tail gas emission device generated by dispersed equipment or facilities. Each connected with its corresponding fan.
Further, all be equipped with pressure PLC controller between buffer tank 1 and the fan 1, buffer tank 2 and fan 2 to and between exhaust gas conduit 3 and the fan 3, pressure PLC controller is used for controlling the wind pressure that corresponding fan provided for the exhaust gas conduit that corresponds.
Further, safety protection valves are arranged on the tail gas pipeline 1, the tail gas pipeline 2 and the tail gas pipeline 3.
Further, the liquid separation tank is connected with the incineration device and comprises: the liquid separation tank is respectively connected with the heat medium furnace 1 through a branch valve 1, connected with the heat medium furnace 2 through a branch valve 2 and connected with the heat medium furnace 3 through a branch valve 3.
Further, the fan 1, the fan 2 and the fan 3 are all explosion-proof fans.
Further, the liquid separation tank is a vertical tank with the volume of 2m3。
The utility model also provides a method for adopt above-mentioned tail gas processing system to handle the tail gas that polyester technology produced, include:
(1) the first type tail gas generated by the first type tail gas emission device is concentrated to a tail gas pipeline 1 and is sequentially conveyed to a liquid separation tank through a main valve 1, a buffer tank 1 and a fan 1;
(2) conveying the second type tail gas generated by the second type tail gas emission device to a liquid separation tank through a tail gas pipeline 2 and a buffer tank 2 and a fan 2;
(3) conveying the third type tail gas generated by the third type tail gas emission device to a liquid separation tank through a tail gas pipeline 3 by a fan 3;
(4) and (3) sending the tail gas in the liquid separation tank into an incineration device connected with the liquid separation tank for incineration treatment, so that the organic matter concentration VOC of the polyester production environment is less than or equal to 20 mg/L.
Further, the amount of tail gas generated in the first type of tail gas in the step (1) is 483-972 m3H; the second classThe amount of the tail gas generated in the tail gas is 99-200 m3H; the amount of the tail gas generated in the third type of tail gas is 525-1058 m3/h。
Further, when the amount of the tail gas is 426-858 m3H, maximum air volume is 1350m3The delivery is carried out by a blower; when the amount of the tail gas is 99-200 m3H, the maximum air quantity is 250m3The delivery is carried out by a blower; when the tail gas amount is 525-1058 m3H, from the maximum air quantity to 1350m3The blower and the maximum air quantity are 250m3And h, combined conveying by using a fan.
Further, the maximum air volume of the fan 1 is 1350m3H; the maximum air quantity of the fan 2 is 250m3H; the fan 3 is composed of two fans with different specifications, one fan has the maximum air volume of 1350m3H, another maximum air volume of 250m3/h。
Further, in the step (4), the tail gas in the liquid separation tank is sent to an incineration device connected with the liquid separation tank for incineration treatment, and the incineration treatment specifically comprises: the tail gas in the liquid separation tank is respectively sent to a heat medium furnace 1 through a branch valve 1, a heat medium furnace 2 through a branch valve 2 and a heat medium furnace 3 through a branch valve 3 after passing through an outlet valve; the heat medium furnace 1, the heat medium furnace 2 and the heat medium furnace 3 are vertical heat medium furnaces which are used for two purposes and one standby, and the production capacity is 1200 million kilocalories.
Further, the working condition of the incineration device in the step (4) is as follows: the temperature of the coil pipe is 315-328 ℃, and the temperature of the heat medium outlet is 315-328 ℃.
Further, when the heat medium furnace 1, the heat medium furnace 2 or the heat medium furnace 3 meets any one of the following conditions, the interlock protection is started:
a. the temperature of the coil pipe of the heating medium furnace is more than or equal to 335 ℃;
b. the outlet temperature of the heating medium furnace is more than or equal to 335 ℃;
c. the flow rate of the heating medium is less than or equal to 730m3/h；
d. The pressure before spraying the natural gas is less than or equal to 0.003 mPa;
e. flame detection a/B is present simultaneously.
Further, pressure PCL controllers are arranged between the buffer tank 1 and the fan 1, between the buffer tank 2 and the fan 2, and between the tail gas pipeline 3 and the fan 3; the pressure is controlled between-100 Pa and-600 Pa.
Further, safety protection valves are arranged on the tail gas pipeline 1, the tail gas pipeline 2 and the tail gas pipeline 3, and the set pressure is set to be-1200 Pa.
The utility model discloses on collecting tail gas pipeline with many close production lines, the same production facility tail gas, all contain aldehyde, ether, acid tail gas in the tail gas that three kinds of exhaust emission device produced mentioned above. A buffer tank and a fan are added by installing a main valve; a buffer tank and a fan are added to tail gas generated by the dispersed production line; a fan is added to tail gas generated by dispersed equipment or facilities; conveying the collected tail gas to a liquid separation tank; pressure PLC control is arranged between the buffer tank and the fan or a safety valve protection is arranged on the tail gas pipeline, so that tail gas in the liquid separating tank is safely fed into the heating medium furnace for incineration.
The beneficial effects of the utility model reside in that:
(1) tail gas is collected and managed close to a plurality of polyester production lines, the generated tail gas is relieved through a buffer tank and is sent out by a fan, and the tail gas is safely combusted in a heat medium furnace under the control of the pressure on a tail gas pipeline;
(2) tail gas generated by a dispersed polyester production line is collected and managed to a buffer tank, so that the generated tail gas is relieved and is sent out by a fan, and the tail gas is safely combusted in a heat medium furnace under the control of pressure on a tail gas pipeline;
(3) tail gas generated by dispersed equipment or facilities is collected and sent out by a fan, and is safely combusted in a heating medium furnace under the control of pressure on a tail gas pipeline;
(4) tail gas generated by a plurality of production lines, dispersed polyester production lines, dispersed equipment or facilities close to the polyester is finally sent to a liquid separation tank, the liquid separation tank is a shared tank for tail gas of each path, and only one liquid separation tank is used for collecting and treating tail gas of the whole polyester device, so that the investment cost is saved;
(5) the tail gas is treated by the heat medium furnace, the interlocking condition of the heat medium furnace is not required to be adjusted, the stable operation of the heat medium furnace is not influenced when the tail gas enters the heat medium furnace, and the field environment of the polyester device is protected.
Drawings
FIG. 1 is a schematic view of a tail gas treatment system for a plurality of polyester production lines of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that numerous modifications and improvements can be made by those skilled in the art without departing from the inventive concepts herein. These all belong to the protection scope of the present invention.
Example 1
An exhaust treatment system for a multiple polyester production line, comprising: the device comprises a first type tail gas discharge device, a main valve 2, a first buffer tank 3, a first fan 4, a second type tail gas discharge device, a second buffer tank 6, a second fan 7, a third type tail gas discharge device, a third fan, a liquid separation tank 10 and an incineration device 11.
The first type tail gas emission device is sequentially connected with the main valve 2, the first buffer tank 3 and the first fan 4 through a first tail gas pipeline (not shown in the figure), the first fan 4 is connected with the liquid separation tank 10, and the first fan 4 is used for extracting and collecting first type tail gas generated by the first type tail gas emission device through the first buffer tank 3 and the main valve 2 and conveying the collected first type tail gas to the liquid separation tank 10.
Moreover, a first pressure PLC controller 12 is arranged between the first buffer tank 3 and the first fan 4, and the first pressure PLC controller 12 is used for controlling the wind pressure provided by the first fan 4 for the first tail gas pipeline, so as to control the extraction and transmission speed of the first type of tail gas in the first tail gas pipeline; a safety protection valve (not shown) is arranged on the first tail gas pipeline.
The first type of tail gas emission device is a tail gas emission device produced by similar production lines and the same production equipment. The method specifically comprises the following steps: the system comprises a wastewater tank 101, a vacuum liquid ring pump 102, a second esterification separation tower 103, a catalyst modulation supply tank 104, first to third polyethylene glycol thermal wells 105 and the like, wherein a first type of tail gas emission device is the prior art.
The second type tail gas discharge device is sequentially connected with a second buffer tank 6 and a second fan 7 through a second tail gas pipeline (not shown in the figure), the second fan 7 is connected with the liquid separation tank 10, and the second fan 7 is used for extracting and collecting second type tail gas generated by the second type tail gas discharge device through the second buffer tank 6 and conveying the collected second type tail gas to the liquid separation tank 10.
Moreover, a second pressure PLC controller 13 is arranged between the second buffer tank 6 and the second fan 7, and the second pressure PLC controller 13 is used for controlling the wind pressure provided by the second fan 7 for the second tail gas pipeline, so as to control the extraction and transmission speed of the second type of tail gas in the second tail gas pipeline; a safety protection valve (not shown) is arranged on the second tail gas pipeline.
The second type of exhaust emission device is a decentralized production line exhaust emission device, such as a glycol seal tank 51.
The third type tail gas discharge device is connected with a third fan through a third tail gas pipeline (not shown in the figure), the third fan is connected with the liquid separation tank 10, and the third fan is used for extracting and collecting third type tail gas generated by the third type tail gas discharge device and conveying the collected third type tail gas to the liquid separation tank 10.
Moreover, a third pressure PLC controller 14 is arranged on the third tail gas pipeline, and the third pressure PLC controller 14 is used for controlling the wind pressure provided by the third fan for the third tail gas pipeline, so as to control the extraction and transmission speed of the third type of tail gas in the third tail gas pipeline; a safety protection valve (not shown) is arranged on the third tail gas pipeline.
The third type of tail gas discharge device is a tail gas discharge device generated by dispersed equipment or facilities, such as waste water tank tail gas in polyester production, waste water tank 81 tail gas, waste water tank 82 tail gas and the like. Each connected to its corresponding fan, for example: the wastewater tank 81 is connected with a third fan 91, and the tail gas of the wastewater tank 82 is connected with a third fan 92.
Divide liquid jar 10 to link to each other with incineration device 11, incineration device 11 is used for dividing the tail gas in liquid jar 10 to burn the processing, specifically includes: the liquid separation tank 10 is connected with a first heating medium heater 112 through a first branch valve 111, a second heating medium heater 114 through a second branch valve 113 and a third heating medium heater 116 through a third branch valve 115 respectively after passing through an outlet valve.
The first fan 4, the second fan 7, the third fan 91 and the third fan 92 are all explosion-proof fans.
The liquid separating tank 10 is a vertical tank with a volume of 2m3。
Example 2
A method for treating tail gas generated by a polyester process by adopting the tail gas treatment system comprises the following steps:
(1) tail gas generated by a waste water tank 101, a vacuum liquid ring pump 102, a second esterification separation tower 103, a catalyst modulation supply tank 104 and first to third polyethylene glycol thermal wells 105 is concentrated into a first tail gas pipeline (the tail gas amount is 680.4 m)3H), sequentially conveying the mixture to a liquid separating tank 10 through a main valve 2, a first buffer tank 3 and a first fan 4; wherein the maximum air volume of the first fan 4 is 1350m3H; a first pressure PCL controller 12 is arranged between the first buffer tank 3 and the first fan 4, and the control pressure is-420 Pa; a safety protection valve is arranged on the first tail gas pipeline 1, and the set pressure low alarm is-1200 Pa;
(2) tail gas generated by a dispersed production line tail gas discharge device (such as a glycol seal tank 51) passes through a second tail gas pipeline (the tail gas amount is 140 m)3H), conveying the mixture to a liquid separation tank 10 through a second buffer tank 6 and a second fan 7; wherein the maximum air volume of the second fan 7 is 250m3H; a second pressure PCL controller 13 is arranged between the second buffer tank 6 and the second fan 7; controlling the pressure to be-420 Pa; a safety protection valve is arranged on the second tail gas pipeline, and the set pressure low alarm is-1200 Pa;
(3) the tail gas of the wastewater pool (wastewater pool 81 and wastewater pool 82) in the polyester production is led to pass through a third tail gas pipeline (the amount of the tail gas is 740.6 m)3H), respectively conveying the mixture to the liquid separation tank 10 through a third fan 91 and a third fan 92; the third fan 92 selects the maximum air volume specification according to the tail gas volume in the third tail gas pipeline; a third pressure PCL controller is arranged between the third tail gas pipeline and the third fan 91 and the third fan 9214; controlling the pressure to be-420 Pa; a safety protection valve is arranged on the third tail gas pipeline, and the set pressure low alarm is-1200 Pa;
(4) the tail gas in the liquid separation tank 10 is respectively sent to a first heat medium furnace 112 through a first branch valve 111, sent to a second heat medium furnace 114 through a second branch valve 113 and sent to a third heat medium furnace 116 through a third branch valve 115; in the embodiment, the first heating medium furnace 112, the second heating medium furnace 114 and the third heating medium furnace 116 are vertical heating medium furnaces, the first branch valve 111 and the second branch valve 113 are opened, the third branch valve 115 is closed, the first heating medium furnace 112 and the second heating medium furnace 114 work, the third heating medium furnace 116 is shut down for standby, the coil temperature is 320 ℃, the heating medium outlet temperature is 320 ℃, and the organic VOC concentration of the polyester production environment is less than or equal to 20 mg/L.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the spirit of the invention and the scope of the appended claims.
Claims (5)
1. An exhaust treatment system for a plurality of polyester production lines, the exhaust treatment system comprising: the system comprises a first type tail gas discharge device, a main valve 1, a buffer tank 1, a fan 1, a second type tail gas discharge device, a buffer tank 2, a fan 2, a third type tail gas discharge device, a fan 3, a liquid separating tank and an incineration device;
the first type tail gas discharge device is sequentially connected with a main valve 1, a buffer tank 1 and a fan 1 through a tail gas pipeline 1, the fan 1 is connected with the liquid separation tank, and the fan 1 is used for extracting and collecting first type tail gas generated by the first type tail gas discharge device through the buffer tank 1 and the main valve 1 and conveying the collected first type tail gas to the liquid separation tank;
the second type tail gas discharge device is sequentially connected with a buffer tank 2 and a fan 2 through a tail gas pipeline 2, the fan 2 is connected with the liquid separation tank, and the fan 2 is used for extracting and collecting second type tail gas generated by the second type tail gas discharge device through the buffer tank 2 and conveying the collected second type tail gas to the liquid separation tank;
the third type tail gas discharge device is connected with a fan 3 through a tail gas pipeline 3, the fan 3 is connected with the liquid separation tank, and the fan 3 is used for extracting and collecting third type tail gas generated by the third type tail gas discharge device and conveying the collected third type tail gas to the liquid separation tank;
the liquid separation tank is connected with the incineration device, and the incineration device is used for carrying out incineration treatment on tail gas in the liquid separation tank.
2. The tail gas treatment system for the polyester multiple production lines, according to claim 1, is characterized in that: the first type of tail gas emission device is a tail gas emission device produced by a similar production line and the same production equipment; the second type of tail gas emission device is a tail gas emission device generated by a scattered production line; the third type of exhaust emission device is an exhaust emission device generated by a decentralized facility or installation.
3. The tail gas treatment system for the polyester multiple production lines, according to claim 1, is characterized in that: between buffer tank 1 and the fan 1, buffer tank 2 and fan 2 to and all be equipped with pressure PLC controller between tail gas pipeline 3 and the fan 3, pressure PLC controller is used for controlling the wind pressure that corresponding fan provided for the tail gas pipeline that corresponds.
4. The tail gas treatment system for the polyester multiple production lines, according to claim 1, is characterized in that: and safety protection valves are arranged on the tail gas pipeline 1, the tail gas pipeline 2 and the tail gas pipeline 3.
5. The tail gas treatment system for the polyester multiple production lines, according to claim 1, is characterized in that: the branch fluid reservoir with burn the device and link to each other, include: the liquid separation tank is respectively connected with the heat medium furnace 1 through a branch valve 1, connected with the heat medium furnace 2 through a branch valve 2 and connected with the heat medium furnace 3 through a branch valve 3.
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