CN211475964U - Tank field high concentration styrene exhaust-gas treatment system - Google Patents
Tank field high concentration styrene exhaust-gas treatment system Download PDFInfo
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- CN211475964U CN211475964U CN201922148460.XU CN201922148460U CN211475964U CN 211475964 U CN211475964 U CN 211475964U CN 201922148460 U CN201922148460 U CN 201922148460U CN 211475964 U CN211475964 U CN 211475964U
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Abstract
The utility model discloses a tank field high concentration styrene waste gas treatment system, the scheme mainly comprises a buffer tank, a fan and GRTO safety type heat accumulating type combustion equipment, wherein the input end of the buffer tank is used as the system input end, and the output end of the buffer tank is communicated with the fan and the input end of the GRTO safety type heat accumulating type combustion equipment; a first air valve is arranged between the input end of the buffer tank and the fan. The utility model provides a scheme not only can thoroughly purify styrene waste gas, and does not produce secondary pollution, has great environmental benefit and social, and solution prior art that can be fine is not enough.
Description
Technical Field
The utility model relates to a waste gas treatment technology, concretely relates to tank field high concentration styrene exhaust-gas treatment technique.
Background
Styrene belongs to aromatic hydrocarbon and is listed as one of eight pollutants in the national standard GB14554-93 discharge Standard for malodorous pollutants. Styrene is used as an important chemical monomer, and has a very wide application range. In the breathing process of the storage tank in the chemical tank field, high-concentration styrene waste gas can be generated, and not only the ecological environment is influenced, but also the human health is seriously influenced. According to the relevant regulation of GB31571-2015 discharge Standard for pollutants for petrochemical industry, the limit of the discharge of styrene in the waste gas is 50mg/m 3.
The prior methods for treating styrene mainly comprise an absorption method, a condensation method and an adsorption method.
Because styrene is insoluble in water, a special absorbent is needed for waste gas treatment, the pregnant solution after absorbing styrene is easy to cause secondary pollution, and meanwhile, the consumption of the absorbent is large and the operation cost is high. The condensation method has simple process and lower efficiency, and generally is difficult to make the styrene tail gas emission reach the standard, or the cost for making the styrene tail gas emission reach the standard is huge energy consumption, and the operation cost is higher. The adsorption method usually adopts activated carbon to purify the styrene waste gas, but the styrene has polymerizability, so that pores of the activated carbon are easily blocked, the activated carbon is inactivated, desorption is difficult, the inactivated activated carbon is dangerous waste, and the problem of secondary pollution exists.
Because the prior styrene waste gas treatment process has the problems of secondary pollution such as waste liquid, solid waste and the like, and the waste gas purification efficiency is low, the high-concentration styrene waste gas in the prior tank field is difficult to meet increasingly strict environmental protection emission requirements through the processes of purification, absorption method, condensation method and adsorption method commonly used for treating the high-concentration styrene waste gas.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of secondary pollution and low purification efficiency of the existing tank field high-concentration styrene waste gas treatment scheme, a new tank field high-concentration styrene waste gas treatment scheme is needed.
Therefore, an object of the utility model is to provide a tank field high concentration styrene exhaust-gas treatment system realizes carrying out high-efficient the processing and not producing secondary pollution to tank field high concentration styrene waste gas from this.
In order to achieve the purpose, the utility model provides a tank field high concentration styrene exhaust-gas treatment system, including buffer tank, fan and GRTO safe type heat accumulation formula combustion apparatus, the input of buffer tank is as system's input, its output with the fan with the input of GRTO safe type heat accumulation formula combustion apparatus communicates; a first air valve is arranged between the input end of the buffer tank and the fan.
Further, a flame arrester is arranged between the fan and the GRTO safety type heat accumulating type combustion equipment.
Furthermore, the GRTO safety heat accumulating type combustion equipment adopts a three-chamber design, and the reaction temperature is more than or equal to 760 ℃.
Furthermore, an oxidation chamber in the GRTO safety type heat accumulating type combustion equipment adopts a structure with the retention time of more than or equal to 1.2s, and a guide plate is arranged in the oxidation chamber.
Further, an oxidation chamber in the GRTO safety type heat accumulating type combustion device is provided with a temperature sensor, and the temperature sensor is interlocked with a gas pipeline cut-off valve on the GRTO safety type heat accumulating type combustion device.
Furthermore, a purging fan capable of purging a combustion furnace of the GRTO safety type heat accumulating type combustion device is arranged on the GRTO safety type heat accumulating type combustion device.
Further, a mixing box is arranged on the GRTO safety type heat accumulating type combustion equipment, and the mixing box is connected with a hearth high-temperature heat bypass in the GRTO safety type heat accumulating type combustion equipment.
Furthermore, an emergency pipeline is configured in the processing system, and the emergency pipeline is connected with the output end of the buffer tank.
Further, emergent pipeline includes emergent pipeline blast gate, emergent fan and emergent active carbon device.
Further, at least one FID flame ion concentration detector is arranged on a combustion furnace inlet pipeline of GRTO safety type heat accumulating type combustion equipment in the processing system, and the FID flame ion concentration detector is interlocked with the first air valve and an emergency pipeline air valve in an emergency pipeline.
Furthermore, an LEL concentration detector is arranged on a main pipeline for inputting waste gas in the treatment system, and the LEL concentration detector is interlocked with the first air valve and an emergency pipeline air valve in an emergency pipeline.
The utility model provides an adopt GRTO safety type heat accumulation burning technology of scheme innovation to handle jar district high concentration styrene waste gas, not only can thoroughly purify styrene waste gas, and do not produce the secondaryPollution; meanwhile, the purification efficiency of the GRTO safe type heat storage combustion process on the styrene can reach more than 99.5 percent, and the GRTO safe type heat storage combustion process can stably run for a long time, so that the treated tail gas is far lower than the emission standard of 50mg/m3The method has the advantages of good discharge, great environmental benefit and social benefit, and capability of well solving the defects of the prior art.
Furthermore, the utility model discloses a GRTO safety type heat accumulation burning scheme have taken a series of safety protection measures, the safety and stability of guarantee system moves.
Drawings
The invention is further described with reference to the following drawings and detailed description.
Fig. 1 is a diagram illustrating an exemplary composition of a system for treating high-concentration styrene exhaust gas in a tank field according to an embodiment of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
The embodiment aims at the innovation of the high-concentration styrene waste gas in the tank field, the GRTO safety type heat storage combustion mode is adopted for processing, and the high-concentration styrene waste gas in the tank field is subjected to oxidation-reduction reaction under the high-temperature condition through the GRTO safety type heat storage combustion mode to generate CO2And H2O。
The safe heat accumulating type combustion process based on GRTO does not bring secondary pollution; and the purification efficiency of the GRTO process on the styrene waste gas can reach 99.5 percent, and the treatment efficiency is greatly improved.
Referring to FIG. 1, a diagram showing an example of the composition of a high concentration styrene offgas processing system of the tank farm given in this example is shown. This processing system can realize adopting GRTO safety type heat accumulation combustion mode to handle tank field high concentration styrene waste gas, high-efficient purification and do not produce secondary pollution.
As can be seen, the tank farm high concentration styrene off-gas treatment system 100 mainly comprises a buffer tank 110, a fan 120 and a GRTO safety type regenerative thermal combustion device 130.
The buffer tank 110 is disposed at the front end of the whole system, and is used for performing certain buffer pretreatment on the exhaust gas to be treated. The input end of the buffer tank 110 is used as the system input end for communicating the high-concentration styrene waste gas in the tank area to be treated through a pipeline; the buffer tank 110 is communicated with the input end of the GRTO safe heat accumulating type combustion device 130 through the fan 120, so that the fan 120 sends the tank area high-concentration styrene waste gas subjected to buffering treatment in the buffer tank 110 into the GRTO safe heat accumulating type combustion device 130, and the GRTO safe heat accumulating type combustion device 130 performs high-temperature combustion treatment on the waste gas entering a combustion furnace of the GRTO safe heat accumulating type combustion device 130.
On the basis, a first air valve 140 is arranged between the input end of the buffer tank 110 and the fan 120, and is used for controlling the system and maintaining the reliability of the operation of the system.
This example reduces styrene exhaust pressure fluctuations by providing a surge tank 110 at the front end of the exhaust gas treatment system.
Preferably, the buffer tank 110 is provided with a corresponding pressure sensor, and the pressure sensor is interlocked with a system fan 120 in the system, so that the system air volume and pressure can be controlled through fan frequency conversion, and the stability of the waste gas collection system is ensured.
Further, in the embodiment, a flame arrester 150 is arranged at the front end of the heat accumulation combustion furnace of the GRTO safety type heat accumulation combustion device 130, and the flame arrester 150 is preferably arranged between the fan 120 and the GRTO safety type heat accumulation combustion device 130, so that the backfire caused by pressure fluctuation of the furnace body can be effectively prevented, and potential safety hazards are brought.
Further, in this embodiment, a fresh air duct is further disposed between the fan 120 and the first air valve 140, and meanwhile, a corresponding fresh air port valve 180 is disposed on the fresh air duct for supplying air to and cooling down the GRTO heat storage combustion furnace in the GRTO safety heat storage combustion device 130.
In this embodiment, an emergency bypass line 160 is further configured on the basis of the above solution to improve the safety of the system.
By way of example, the emergency bypass line 160 is mainly formed by an emergency fan 161, an emergency activated carbon device 162 and a first emergency air valve 163. Here, the input end of the emergency blower 161 is connected to the output end of the buffer tank 110 through a pipe, and the connection point is located between the buffer tank 110 and the first air valve 140.
The output of the emergency fan 161 is connected to the input of the emergency activated carbon unit 162, and the output of the emergency activated carbon unit 162 is connected to the exhaust funnel 170 of the entire system.
In addition, a second emergency air valve 164 can be arranged at the rear end of the emergency activated carbon device 162 according to requirements.
The emergency bypass pipeline 160 formed by the method can be interlocked with other detection components in the system, so that the linkage automatic control of the system is realized, and the system can be ensured to reach the emission standard under the emergency condition.
In the GRTO safety heat accumulating type combustion device 130 in this embodiment, the GRTO heat accumulating type combustion furnace has a three-chamber structure, and the reaction temperature is greater than or equal to 760 ℃, so that the styrene waste gas can be fully reacted at a high temperature, and the purification efficiency is high.
The reaction temperature can be realized by controlling a combustion system configured by GRTO, for example, natural gas is introduced, and the temperature in the GRTO furnace is ensured to be more than or equal to 760 ℃ by controlling a flow interlocking temperature sensor of the natural gas.
Moreover, the residence time of the oxidation chamber of the GRTO safety heat accumulating type combustion device 130 is not less than 1.2s, and for this reason, the flowing distance of the airflow from the airflow inlet to the airflow outlet is prolonged, so that the flowing time of the airflow in the GRTO furnace body reaches 1.2s
On the basis, the guide plate is arranged in the oxidation chamber, and particularly, 3-4 partition plates are arranged in the hearth of the oxidation chamber to guide the gas flow direction and prolong the gas flow distance, so that the retention time of the gas flow in the hearth is prolonged, the reaction is more sufficient, and the purification efficiency is improved.
Therefore, the styrene waste gas can uniformly and fully react in the oxidation chamber, and the purification efficiency is improved.
The FID flame ion concentration detector is arranged near the inlet pipeline of the regenerative combustion furnace of the GRTO safety regenerative combustion device 130, and is interlocked with the first emergency air valve 163 and the first air valve 140 in the emergency bypass pipeline 160. The specific arrangement position of the FID flame ion concentration detector is determined according to actual requirements, and the FID flame ion concentration detector can be arranged at about 70-85m of an inlet pipeline of a regenerative combustion furnace.
The FID flame ion concentration detector can effectively detect the concentration of the styrene waste gas in the tank area when the concentration of the styrene reaches 25% of the lower explosion limit (namely 12786 mg/m)3) The FID flame ion concentration detector sends out the high warning, and the parallel lock GRTO entry blast gate (being first blast gate 140) and emergent pipeline blast gate (being first emergent blast gate 163), self-closing GRTO entry blast gate opens emergent pipeline blast gate, switches through the valve, introduces emergent pipe-line system with high concentration styrene waste gas, prevents to get into GRTO safety type heat accumulation combustion apparatus, arouses the explosion risk.
On the basis, the two FID flame ion concentration detectors are preferably arranged at the position of about 75m of the inlet pipeline of the GRTO safety type heat storage combustion furnace, so that accidental faults of the detectors or untimely verification can be prevented, and high alarm signals are not detected, so that potential safety hazards are brought.
Further, in this embodiment, a gas pipeline 131, a combustion fan 132, a purge fan 133 and a mixing box 134 are further disposed on the GRTO safe heat accumulating type combustion device 130.
Here, the gas line 131, the combustion fan 132, and the purge fan 133 are communicated with the GRTO safety type regenerative thermal combustion furnace in the GRTO safety type regenerative thermal combustion apparatus 130. The blowing fan 133 arranged here is used for blowing the GRTO safety type heat storage combustion furnace when the system is started, so as to replace 6 times of gas and ensure that no high-concentration gas is accumulated in GRTO equipment.
The mixing box 134 is connected with a hearth high-temperature hot bypass of the GRTO safety type heat storage combustion furnace, so that process waste gas with overhigh hearth temperature can be discharged in time, and potential safety hazards caused by overhigh hearth temperature can be prevented.
On the basis, the temperature sensor is also arranged in the furnace body oxidation chamber of the GRTO safety type heat accumulating type combustion device 130, and the temperature sensor can interlock the opening of the gas pipeline cut-off valve and the opening of the fresh air inlet valve.
For example, when the temperature component detects that the temperature in the furnace exceeds a set value of 760 ℃, the gas pipeline cut-off valve is automatically closed, and heat supply is stopped. When the temperature component detects that the temperature in the furnace exceeds the set value of 900 ℃, the fresh air inlet valve is automatically opened to supplement air into the furnace and reduce the temperature. When the temperature in the furnace continues to rise, the GRTO high-temperature bypass valve is automatically opened, a large amount of waste heat is discharged through the mixing box 134, and the potential safety hazard caused by overhigh temperature in the furnace is prevented.
Still further, adopt the gas seal poppet valve among this GRTO safe type heat accumulation formula combustion apparatus 130, ensure the nearly zero gas tightness of leaking of system's equipment to improve styrene exhaust purification efficiency. The lift valve is arranged behind the flame arrester and before the lift valve enters the GRTO regenerator, airflow enters the first regenerator through the lift valve switching, and after 3min, the lift valve is switched to enter the second regenerator and then sequentially enters the three regenerators. Conventional poppet valve is hardware seal, leaks gas easily, and life is short, and the air seal poppet valve of this scheme adoption forms one air curtain through letting in compressed air, and the gas tightness is better, and the rate of revealing is low.
Finally, the present example is provided with an LEL concentration detector on the main exhaust gas conduit, which is interlocked with the first emergency damper 163 and the first damper 140 in the emergency bypass conduit 160.
The LEL concentration detector is used for monitoring the concentration of the waste gas at any time, and when the concentration of the styrene in the waste gas reaches or is higher than 25% of the lower explosion limit, the process waste gas is introduced into the emergency bypass system by switching the valve; and when the concentration of the styrene waste gas in the waste gas is lower than the lower explosion limit of 25%, the process waste gas enters the GRTO safety type heat storage combustion system.
The tank field high concentration styrene waste gas treatment system that constitutes from this, its innovative GRTO safe type heat accumulation formula burning technology that adopts handles tank field high concentration styrene waste gas, purifies thoroughly, can not produce secondary pollution. Moreover, the purification efficiency of the high-concentration styrene waste gas in the tank area is high by the GRTO safe heat accumulating type combustion process, and can reach more than 99.5%, so that the method has good environmental benefit and social benefit.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The tank field high-concentration styrene waste gas treatment system is characterized by comprising a buffer tank, a fan and GRTO safety heat accumulating type combustion equipment, wherein the input end of the buffer tank is used as the system input end, and the output end of the buffer tank is communicated with the fan and the input end of the GRTO safety heat accumulating type combustion equipment; a first air valve is arranged between the input end of the buffer tank and the fan.
2. The tank farm high concentration styrene off-gas treatment system of claim 1, wherein a flame arrestor is provided between the fan and the GRTO safe regenerative combustion device.
3. The can area high concentration styrene waste gas treatment system of claim 1, wherein the GRTO safe regenerative thermal combustion device is of a three-chamber design, and the reaction temperature is greater than or equal to 760 ℃.
4. The system for treating the high-concentration styrene waste gas in the tank farm according to claim 1, wherein an oxidation chamber in the GRTO safe heat accumulating type combustion device is in a structure with the retention time of more than or equal to 1.2s, and a guide plate is arranged in the oxidation chamber.
5. The tank farm high concentration styrene off-gas treatment system of claim 1, wherein the oxidation chamber of the GRTO safe heat accumulating type combustion device is provided with a temperature sensor, and the temperature sensor is interlocked with a gas pipeline cut-off valve on the GRTO safe heat accumulating type combustion device.
6. The system of claim 1, wherein the GRTO safe regenerative thermal combustion device is provided with a purge fan for purging a combustion furnace of the GRTO safe regenerative thermal combustion device.
7. The tank farm high concentration styrene off-gas treatment system of claim 1, wherein a mixing box is arranged on the GRTO safe heat accumulating type combustion device, and the mixing box is connected with a hearth high temperature heat bypass in the GRTO safe heat accumulating type combustion device.
8. The tank farm high concentration styrene exhaust gas treatment system according to claim 1, wherein an emergency pipeline is configured in the treatment system, and the emergency pipeline comprises an emergency pipeline air valve, an emergency fan and an emergency activated carbon device.
9. The system of claim 8, wherein at least one FID flame ion concentration detector is disposed in the inlet duct of the GRTO burner of the regenerative thermal combustion device, and is interlocked with the first air valve and the emergency line air valve in the emergency line.
10. The system of claim 8, wherein an LEL concentration detector is arranged on a main pipeline of the treatment system for inputting the waste gas, and the LEL concentration detector is interlocked with the first air valve and an emergency pipeline air valve in an emergency pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922148460.XU CN211475964U (en) | 2019-12-04 | 2019-12-04 | Tank field high concentration styrene exhaust-gas treatment system |
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| CN201922148460.XU CN211475964U (en) | 2019-12-04 | 2019-12-04 | Tank field high concentration styrene exhaust-gas treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864311A (en) * | 2019-12-04 | 2020-03-06 | 上海安居乐环保科技股份有限公司 | Tank field high-concentration styrene waste gas treatment system and method |
| CN113952821A (en) * | 2021-07-22 | 2022-01-21 | 上海安居乐环保科技股份有限公司 | Comprehensive treatment method and system for waste gas in loading and unloading area of tank field |
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2019
- 2019-12-04 CN CN201922148460.XU patent/CN211475964U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864311A (en) * | 2019-12-04 | 2020-03-06 | 上海安居乐环保科技股份有限公司 | Tank field high-concentration styrene waste gas treatment system and method |
| CN113952821A (en) * | 2021-07-22 | 2022-01-21 | 上海安居乐环保科技股份有限公司 | Comprehensive treatment method and system for waste gas in loading and unloading area of tank field |
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