CN115337749A - Methanol reservoir area and methanol loading VOCs gas treatment system - Google Patents
Methanol reservoir area and methanol loading VOCs gas treatment system Download PDFInfo
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- CN115337749A CN115337749A CN202211035131.4A CN202211035131A CN115337749A CN 115337749 A CN115337749 A CN 115337749A CN 202211035131 A CN202211035131 A CN 202211035131A CN 115337749 A CN115337749 A CN 115337749A
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 142
- 238000003860 storage Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 239000012071 phase Substances 0.000 claims abstract description 16
- 239000000571 coke Substances 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 239000007791 liquid phase Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- -1 methane hydrocarbon Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a methanol reservoir area and a methanol loading VOCs gas treatment system, which comprises: the methanol storage area is provided with a storage tank, the top of the storage tank is sequentially provided with a nitrogen seal facility, a tail gas collecting pipeline, a single-breath valve and a flame arrester, and the front and the back of the flame arrester are provided with manual valves; the upper part of the inlet of the crude alcohol underground tank is provided with a nitrogen seal valve group and a safety valve, the upper part of the outlet of the crude alcohol underground tank is provided with a one-way valve and a flame arrester, and the front part and the rear part of the flame arrester are provided with manual valves; a fan, a flame arrester and a manual valve are arranged in front of the tail gas treatment facility, and an online alcohol content analyzer, a cut-off valve and an emptying valve are arranged behind the tail gas treatment facility; the loading facility for loading the methanol comprises an upper loading facility and a submerged loading facility additionally arranged at the rear side of the upper loading facility, wherein a (liquid phase + gas phase) loading arm is filled by adopting a set of universal joints. In the invention, the tail gas is collected, purified and then sent to the comprehensive heating furnace and the coke oven gas heating furnace for air distribution, and the tail gas is cracked under the high-temperature condition, so that the standard emission of VOCs is realized.
Description
Technical Field
The invention relates to the technical field of chemical gas treatment, in particular to a methanol storage area and a methanol loading VOCs gas treatment system.
Background
The methanol storage tank is an internal floating roof type storage tank, a nitrogen seal is arranged in the methanol storage area, and when the pressure exceeds 1.6KPa, the breather valve is opened, the tail gas containing alcohol is discharged into the air; the loading platform is of an upper loading structure, and tail gas containing alcohol is dissipated into the air through a manhole in the loading process. The methanol tail gas is dissipated into the air, which not only causes resource waste, but also influences the production environment, and increases unsafe factors of the production area. At present, the methanol storage area of our company is 5000m 3 Two refined methanol storage tanks, 168m 3 Two refined methanol metering tanks, 168m 3 480m fusel groove 3 And carrying out first rough alcohol groove and 5m underground groove cultivation. The methanol loading platform is provided with 4 loading parking places, each loading parking place is of an upper loading type structure, a methanol storage tank is provided with a nitrogen seal, the pressure exceeds 1.6KPa, a breather valve is opened, and methanol tail gas is discharged into the atmosphere; the methanol loading is the facial make-up structure, packs into through the upper portion manhole, and during loading in-process part tail gas process manhole loss to the air, two regional VOCs tail gas composition are the same basically, are the tail gas that contains the alcohol, contain the tail gas unorganized and discharge and go in the air, resources are wasted, influence environment, the safe risk increases.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a methanol storage area and a methanol-loaded VOCs gas treatment system.
In order to achieve the purpose, the invention adopts the following technical scheme:
gaseous processing system of methanol storage district, methanol loading VOCs includes:
the methanol storage area is provided with a storage tank, the top of the storage tank is sequentially provided with a nitrogen seal facility, a tail gas collecting pipeline, a single-breath valve and a flame arrester, and the front and the back of the flame arrester are provided with manual valves;
the upper part of the inlet of the crude alcohol underground tank is provided with a nitrogen seal valve group and a safety valve, the upper part of the outlet of the crude alcohol underground tank is provided with a one-way valve and a flame arrester, and the front part and the rear part of the flame arrester are provided with manual valves;
a fan, a flame arrester and a manual valve are arranged in front of the tail gas treatment facility, and an online alcohol content analyzer, a cut-off valve and an emptying valve are arranged behind the tail gas treatment facility;
the loading facility for methanol loading comprises an upper loading facility and a submerged loading facility additionally arranged at the rear side of the upper loading facility, so that the upper loading and the lower loading can be switched at any time, and a (liquid phase + gas phase) loading crane pipe is filled by adopting a set of universal joints;
collecting tail gas of a methanol storage area and a methanol loading and unloading vehicle, enabling the tail gas of the methanol loading area and the methanol storage area to enter a tail gas absorption tower under the action of a booster fan, washing and absorbing the methanol by using desalted water by utilizing the principle that the methanol is dissolved in water, enabling the methanol tail gas to enter from the lower part of the tail gas absorption tower, discharging the methanol from the upper part, enabling circulating water to be in reverse contact from top to bottom, fully absorbing the methanol, periodically discharging a pregnant solution into a crude alcohol underground tank, and controlling the liquid discharge through liquid level; after purification treatment, the gas is used for air distribution of the gas heating furnace, when the fan of the heating furnace is stopped suddenly, the newly added fan is interlocked and stopped, the system is cut off, the air suction port of the newly added fan is fully opened, and the air is temporarily exhausted by utilizing the air suction port of the newly added fan;
the loading facility is provided with a gas phase crane pipe and a flame arrester, the loaded gas phase enters the inlet of the induced draft fan from the crane pipe, the frequency conversion of the fan is controlled by the pressure interlock of the inlet of the fan, and the gas phase is pressurized by the fan, then sent to the tail gas purification facility for treatment and then sent to the coke oven gas heating furnace and the comprehensive heating furnace for air distribution;
pumping the waste water of the tail gas treatment facility to a crude alcohol underground tank; a liquid level meter (keeping the liquid level height at 80%) and a sampling point (sampling once every shift) are arranged on the tail gas treatment tower, the methanol content of the sampling result reaches 20%, and the liquid is pumped to a crude alcohol underground tank through a crude alcohol pump; stopping conveying when the liquid level of the tail gas treatment tower is reduced to 20%, supplementing desalted water, and stopping supplementing when the liquid level of the tail gas treatment tower is supplemented to 80%, so as to play a role of periodic replacement;
after the tail gas of the methanol storage area and the methanol loading and unloading vehicle is recycled and is analyzed by a methanol online analyzer before being sent to a coke oven gas heating furnace for air distribution, the tail gas after analysis and treatment must reach the standards that the total non-methane hydrocarbon is less than or equal to 120mg/m < 3 > and the methanol is less than or equal to 50mg/m < 3 >, once the methanol content of the tail gas is detected to exceed the standard (the methanol content is more than 25 percent LEL), a cut-off valve is immediately closed in a linkage manner, and unqualified tail gas is prevented from being discharged to the heating furnace.
Preferably, when the pressure in the storage tank reaches 0.9kpa, the single-expiration valve opens tail gas and sends the tail gas to an inlet of the induced draft fan, and the tail gas and the vehicle-loading tail gas are pressurized and sent to a tail gas purification facility by the fan and then sent to the gas heating furnace for air distribution.
Preferably, the flame arrester arranged at the upper part of the outlet of the crude alcohol underground tank is within 5 m.
Preferably, the comprehensive heating furnace is a low-burning square box furnace, the generated high-temperature flue gas enters the convection section from a flue of a radiation chamber at the upper part of the heating furnace, and the flue gas is exhausted from a chimney after passing through the coke steaming heating section, the steam superheating section, the coke steaming preheating section and the air preheating section.
The invention has the beneficial effects that:
1. the tail gas generated by overpressure emission of the methanol storage tank and methanol loading emission into the air affect the safety of a production area and the treatment of VOCs, the tail gas composition and properties are basically the same, the production characteristics of the methanol area are combined, the principle of nearby treatment, investment reduction and reasonable utilization is taken as the principle, facilities such as equipment, pipelines and the like are additionally arranged, and the facilities such as an electrical instrument and the like are matched, so that the tail gas is collected, purified and then sent to a comprehensive heating furnace and a coke oven gas heating furnace for air distribution, and the tail gas is cracked under the high-temperature condition, so that the standard emission of the VOCs is realized.
2. Each emission point is dispersedly arranged, the pressure is different, according to the characteristics of tail gas composition, pressure and property of each region, the region is treated nearby, valuable components are recovered, and no emission point is realized.
Drawings
FIG. 1 is a schematic view of a process flow of a methanol storage area and a methanol on-load VOCs gas treatment system according to the present invention;
FIG. 2 is a schematic diagram of a crude alcohol underground tank of a methanol storage area and a methanol loading VOCs gas treatment system provided by the invention.
In the figure: 1. a booster fan; 2. a tail gas absorption tower; 3. a comprehensive heating furnace; 4. crude alcohol underground tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-2, a methanol storage area, methanol on-board VOCs gas treatment system, comprising:
the methanol storage area is provided with a storage tank, the top of the storage tank is sequentially provided with a nitrogen seal facility, a tail gas collecting pipeline, a single-breath valve and a flame arrester, and the front and the back of the flame arrester are provided with manual valves;
the upper part of the inlet of the crude alcohol underground tank 4 is provided with a nitrogen seal valve group and a safety valve, the upper part of the outlet of the crude alcohol underground tank 4 is provided with a one-way valve and a flame arrester, and the front part and the rear part of the flame arrester are provided with manual valves;
a fan, a flame arrester and a manual valve are arranged in front of the tail gas treatment facility, and an online alcohol content analyzer, a cut-off valve and an emptying valve are arranged behind the tail gas treatment facility;
the loading facility for methanol loading comprises an upper loading facility and a submerged loading facility additionally arranged at the rear side of the upper loading facility, so that the upper loading and the lower loading can be switched at any time, and a (liquid phase + gas phase) loading crane pipe is filled by adopting a set of universal joints;
collecting tail gas of a methanol storage area and a methanol loading and unloading vehicle, enabling the tail gas of the methanol loading and unloading vehicle to enter a tail gas absorption tower 2 under the action of a booster fan 1, washing and absorbing the methanol by using desalted water by utilizing the principle that the methanol is dissolved in water, enabling the methanol tail gas to enter from the lower part of the tail gas absorption tower 2, discharging from the upper part, enabling circulating water to be in reverse contact from top to bottom, fully absorbing the methanol, enabling rich liquid to be periodically discharged into a crude alcohol underground tank 4, and controlling liquid discharge through liquid level; after purification treatment, the gas is used for air distribution of the gas heating furnace, when the fan of the heating furnace is stopped suddenly, the newly added fan is interlocked and stopped, the system is cut off, the air suction port of the newly added fan is fully opened, and the air is temporarily exhausted by utilizing the air suction port of the newly added fan;
the loading facility is provided with a gas phase crane pipe and a flame arrester, the loaded gas phase enters the inlet of the induced draft fan from the crane pipe, the frequency conversion of the fan is controlled by the pressure interlock of the inlet of the fan, and the gas phase is pressurized by the fan, then sent to the tail gas purification facility for treatment and then sent to the coke oven gas heating furnace and the comprehensive heating furnace 3 for air distribution;
pumping the waste water of the tail gas treatment facility and then conveying the waste water to a crude alcohol underground tank 4; a liquid level meter (keeping the liquid level height at 80%) and a sampling point (sampling once every shift) are arranged on the tail gas treatment tower, the methanol content of the sampling result reaches 20%, and the liquid is pumped to a crude alcohol underground tank 4 through a crude alcohol pump; stopping conveying when the liquid level of the tail gas treatment tower is reduced to 20%, supplementing desalted water, and stopping supplementing when the liquid level of the tail gas treatment tower is supplemented to 80%, so as to play a role of periodic replacement;
after the tail gas of the methanol reservoir area and the methanol loading and unloading vehicle is recovered and treated, the tail gas is analyzed by a methanol online analyzer before being sent to a coke oven gas heating furnace for air distribution, the tail gas after analysis and treatment must meet the standards that the total non-methane hydrocarbon is less than or equal to 120mg/m < 3 > and the methanol is less than or equal to 50mg/m < 3 >, once the methanol content of the tail gas is detected to exceed the standard (the methanol content is more than 25 percent LEL), a cut-off valve is immediately interlocked and closed, and the unqualified tail gas is prevented from being discharged to the heating furnace.
In a specific embodiment, when the pressure in the storage tank reaches 0.9kpa, a single-expiratory valve opens the tail gas and sends the tail gas to an inlet of an induced draft fan, the tail gas and the tail gas loaded on a vehicle are boosted by the induced draft fan and sent to a tail gas purification facility for treatment, and then the tail gas and the tail gas are sent to a gas heating furnace for air distribution.
In a specific embodiment, the flame arrester disposed above the outlet of crude alcohol underground tank 4 is within 5 m.
In the specific embodiment, the comprehensive heating furnace 3 is a low-burning square box furnace, the generated high-temperature flue gas enters the convection section from the flue of the upper radiation chamber of the heating furnace, and the flue gas is exhausted from a chimney after passing through the coke steaming heating section, the steam superheating section, the coke steaming preheating section and the air preheating section.
Through technical communication and field investigation, the company adopts the processing method by combining the practical situation of the company: the tail gas (warehouse area, loading and unloading vehicle) containing methanol is collected and purified and then used for air distribution of the gas heating furnace, and when the fan of the heating furnace is suddenly stopped, the air is temporarily exhausted by using the air suction inlet of the fan. Methanol loading is added with a new loading facility, and a (liquid phase + gas phase) loading oil filling pipe is filled by adopting a set of universal joints. The loading facility is provided with a gas phase oil filling riser and a flame arrester, the loading gas phase enters the inlet of the induced draft fan from the oil filling riser, the frequency conversion of the fan is controlled by the pressure interlock of the inlet of the fan, and the gas is pressurized by the fan, then is sent to the tail gas purification facility for treatment and then is sent to the comprehensive heating furnace 3 for air distribution. After the tail gas is purified, the part of the tail gas is introduced into a comprehensive heating furnace 3 and a coke oven gas heating furnace for incineration, and is cracked under the high-temperature condition, so that the VOCs are discharged up to the standard.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (4)
1. Methyl alcohol storehouse district, methyl alcohol loading VOCs gas treatment system, its characterized in that includes:
the methanol storage area is provided with a storage tank, the top of the storage tank is sequentially provided with a nitrogen seal facility, a tail gas collecting pipeline, a single-breath valve and a flame arrester, and the front and the back of the flame arrester are provided with manual valves;
the upper part of the inlet of the crude alcohol underground tank is provided with a nitrogen seal valve group and a safety valve, the upper part of the outlet of the crude alcohol underground tank is provided with a one-way valve and a flame arrester, and the front part and the rear part of the flame arrester are provided with manual valves;
a fan, a flame arrester and a manual valve are arranged in front of the tail gas treatment facility, and an online alcohol content analyzer, a cut-off valve and an emptying valve are arranged behind the tail gas treatment facility;
the loading facility for methanol loading comprises an upper loading facility and a submerged loading facility additionally arranged at the rear side of the upper loading facility, and a (liquid phase + gas phase) loading arm is filled by adopting a set of universal joints;
collecting tail gas of a methanol storage area and a methanol loading and unloading vehicle, enabling the tail gas of the methanol loading and unloading vehicle and the tail gas of the methanol storage area to enter a tail gas absorption tower under the action of a booster fan, washing and absorbing the methanol by using desalted water, enabling the methanol tail gas to enter from the lower part of the tail gas absorption tower, discharging from the upper part of the tail gas absorption tower, enabling circulating water to reversely contact from top to bottom, fully absorbing the methanol, periodically discharging a pregnant solution into a crude alcohol tank, and controlling liquid discharge through liquid level; after purification treatment, the gas is used for air distribution of the gas heating furnace, when the fan of the heating furnace is stopped suddenly, the newly added fan is interlocked and stopped, the system is cut off, the air suction port of the newly added fan is fully opened, and the air is temporarily exhausted by utilizing the air suction port of the newly added fan;
the loading facility is provided with a gas phase oil filling riser and a flame arrester, the loaded gas phase enters an inlet of a draught fan from the oil filling riser, the frequency conversion of the draught fan is controlled by the pressure interlocking of the inlet of the draught fan, and the gas phase is pressurized by the draught fan, then sent to a tail gas purification facility for treatment and then sent to a coke oven gas heating furnace and a comprehensive heating furnace for air distribution;
pumping the waste water of the tail gas treatment facility to a crude alcohol underground tank; a liquid level meter and a sampling point are arranged on the tail gas treatment tower, the content of the methanol reaches 20% in the sampling result, and the liquid is pumped to a crude alcohol underground tank through a crude alcohol pump; stopping conveying when the liquid level of the tail gas treatment tower is reduced to 20%, supplementing desalted water, and stopping supplementing when the liquid level of the tail gas treatment tower is supplemented to 80%, so as to play a role of periodic replacement;
after the tail gas of the methanol storage area and the methanol loading and unloading vehicle is recycled and processed, the tail gas is analyzed by a methanol online analyzer before being sent to a coke oven gas heating furnace for air distribution, if the methanol content of the tail gas exceeds the standard, a cut-off valve is immediately closed in a linkage manner, and unqualified tail gas is prevented from being discharged to the heating furnace.
2. The methanol storage area and methanol loading VOCs gas treatment system of claim 1, wherein when the pressure in the storage tank reaches 0.9kpa, the single-expiration valve opens tail gas and sends the tail gas to the inlet of the induced draft fan, and the tail gas and the loading tail gas are boosted by the fan and sent to the tail gas purification facility for treatment and then sent to the coke oven gas heating furnace for air distribution.
3. The methanol storage area, methanol on-board VOCs gas treatment system of claim 1, wherein the flame arrestor disposed above the crude alcohol underground tank outlet is within 5 m.
4. The methanol storage area, methanol on-board VOCs gas processing system of claim 1, wherein said integrated heater is low-fired Fang Xianglu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211035131.4A CN115337749A (en) | 2022-08-26 | 2022-08-26 | Methanol reservoir area and methanol loading VOCs gas treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211035131.4A CN115337749A (en) | 2022-08-26 | 2022-08-26 | Methanol reservoir area and methanol loading VOCs gas treatment system |
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| CN115337749A true CN115337749A (en) | 2022-11-15 |
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2022
- 2022-08-26 CN CN202211035131.4A patent/CN115337749A/en active Pending
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| WO2016058400A1 (en) * | 2014-10-16 | 2016-04-21 | 天津奥展兴达化工技术有限公司 | Process for purification of tail gas containing volatile organics |
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