CN113230817A - Organic waste gas series treatment process - Google Patents
Organic waste gas series treatment process Download PDFInfo
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- CN113230817A CN113230817A CN202110662106.8A CN202110662106A CN113230817A CN 113230817 A CN113230817 A CN 113230817A CN 202110662106 A CN202110662106 A CN 202110662106A CN 113230817 A CN113230817 A CN 113230817A
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- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/402—Further details for adsorption processes and devices using two beds
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Abstract
The invention relates to a series treatment process for organic waste gas. The process provided by the invention is used for burning residual substances to meet the zero emission requirement after volatile organic compounds are recycled, and mainly realizes recycling of organic solvents, full combustion and great reduction of carbon emission by effectively combining a recycling mode and a combustion treatment mode in series. In the recovery process of the recovery equipment, the series-parallel operation of the system process is realized by switching the series-parallel operation modes of the cooling fan and the desorption fan, the heat energy generated when the adsorption purification bed is cooled is used for desorption heating of the concentration bed through the central heat exchanger, the heat energy generated after the temperature rise and desorption of the concentration bed returns to the adsorption purification bed for desorption heating, the heat energy of the whole process flow of the temperature rise and desorption of the concentration bed is recycled, the desorption heating cost is saved by more than 30%, the cycle period is shortened by more than 40%, the recovery capacity is improved by more than 40%, and the recovery equipment has good environmental protection benefits and economic benefits.
Description
Technical Field
The invention relates to the technical field of organic waste gas treatment, in particular to a series treatment process for organic waste gas.
Background
The organic waste gas treatment refers to the treatment work of adsorption, filtration and purification of organic waste gas generated in the industrial production process. The organic waste gas treatment is generally carried out by air purification of organic substances containing carbon, such as carbon-hydrogen oxygen, such as formaldehyde organic waste gas treatment, benzene series organic waste gas treatment such as benzene toluene xylene, acetone butanone organic waste gas treatment, ethyl acetate waste gas treatment, oil mist organic waste gas treatment, furfural organic waste gas treatment, styrene and acrylic acid organic waste gas treatment, resin organic waste gas treatment, additive organic waste gas treatment, paint mist organic waste gas treatment, and Tianna water organic waste gas treatment. At present, volatile organic compounds are treated by two main processes of recycling and reusing organic solvents and burning the organic solvents, wherein the recycling mode has the defects of generating organic solvent residues and waste water to form hazardous waste, and the direct burning treatment mode can generate a large amount of carbon dioxide and has the phenomenon of insufficient burning, so that the emission requirement of a higher standard is difficult to meet.
At present, most of industrial waste gas is environment-friendly treatment, organic dissolved matters in purified waste gas are adsorbed by using an adsorbent with a high specific surface area, and adsorbed organic matters are resolved or desorbed and concentrated through the process of temperature rise desorption and the like, so that the method is a commonly adopted technical method for environment-friendly treatment of industrial waste gas, but the energy waste of the existing adsorption and resolution process is serious.
Disclosure of Invention
In view of the problems in the prior art, the invention discloses an organic waste gas series treatment process, which adopts the technical scheme that the process comprises the following steps:
the method comprises the following steps: the method comprises the following steps that a waste gas discharge port of a production workshop is communicated and connected with a recovery device through a communication pipeline, and organic substances in waste gas are adsorbed and desorbed through the recovery device;
step two: the exhaust port of the recovery equipment is communicated and connected with the combustion equipment through a communication pipeline, the exhaust port of the recovery equipment is simultaneously communicated and connected with an exhaust pipe, the recovery equipment finishes treatment on waste gas according to adsorption, desorption and discharge process flows, gas which meets the discharge standard is directly discharged through the exhaust pipe, and gas which does not meet the discharge standard is introduced into the combustion equipment;
step three: introducing gas containing organic waste gas into the combustion equipment to carry out combustion treatment in the combustion equipment; step four: communicating the gas reaching the standard after the full combustion of the combustion equipment to an exhaust pipe and discharging the gas;
step five: and respectively conveying the heat energy generated by the combustion of the combustion equipment to a production workshop and recovery equipment through a heat energy conveying pipeline so as to fully utilize the heat energy generated by the combustion equipment.
As a preferable scheme of the invention, the recovery device comprises a heater, a cooling condenser, a central heat exchanger, a main condenser, an adsorption purification bed, a pretreatment device, a concentration bed, an oxygen content detector, a hot air temperature sensor and a desorption pressure sensor, wherein an inlet of the pretreatment device is connected with a waste gas inlet pipe, an outlet of the pretreatment device is connected with an adsorption fan through a pipeline, an air outlet of the adsorption fan is connected with an air inlet of the adsorption purification bed through a pipeline, a purification bed adsorption inlet valve is arranged on the pipeline, an air outlet of the adsorption purification bed is connected with a discharge pipeline through a communication way, a purification bed adsorption discharge valve is arranged on the discharge pipeline, and a branch pipeline is directly connected with an outlet of the discharge pipeline and is provided with a detection valve; the nitrogen gas inlet pipe is sequentially connected with a desorption nitrogen supplement valve, a bypass valve, a desorption fan, an oxygen content detector, a heater, a hot air temperature sensor, a heated isolation valve, a desorption pressure sensor and a purification bed desorption inlet valve in series and is communicated with a gas outlet of the adsorption purification bed; insert in the recovery plant in proper order on the heat energy conveying pipeline after isolation valve, central heat exchanger, heat transfer, isolation valve, main condenser, the condensation back valve, and the intercommunication is connected in the desorption mend nitrogen valve with between the bypass valve on the nitrogen gas intake pipe, heat energy conveying pipeline's import with intercommunication between the cooling fan is connected with the bleeder line and installs on the bleeder line and purify the bed desorption blow-off valve and intercommunication and be connected to adsorb the air inlet department that purifies the bed, the air inlet of nitrogen gas intake pipe with it connects through the bleeder line intercommunication between the nitrogen gas valve to adsorb the air inlet that purifies the bed and install on the bleeder line and purify the bed nitrogen valve, the desorption mend the nitrogen valve with between the condensation back valve on the nitrogen gas intake pipe through the pipeline intercommunication connect the export of central heat exchanger, the inlet of the central heat exchanger is connected with a condensation back heat exchange valve through a pipeline and is communicated with and connected with the outlet of the main condenser, the nitrogen gas inlet pipe between the condensation back valve and the bypass valve is sequentially communicated and connected with a concentration bed adsorption inlet valve and a concentration bed heat exchange valve through branch pipelines and is finally communicated and connected with the inlet of the central heat exchanger, one end of a second-stage desorption discharge valve is connected with the pipeline between the concentration bed adsorption inlet valve and the concentration bed heat exchange valve, the other end of the second-stage desorption discharge valve is connected with the pipeline between the heat exchange back isolation valve and the main condenser, the main condenser is connected with a recovery pipeline, the nitrogen gas inlet pipe corresponding to the position of the hot air temperature sensor is communicated and connected with a branch pipeline and is sequentially provided with a concentration bed desorption inlet valve and a concentration bed adsorption discharge valve, and is finally connected with the nitrogen gas inlet pipe between the bypass valve and the desorption fan, concentrated bed import intercommunication inserts concentrated bed adsorb inlet valve with on the pipeline between the concentrated bed heat-transfer valve, export intercommunication inserts concentrated bed desorption inlet valve with on the pipeline between the concentrated bed adsorption discharge valve, desorption pressure sensor with on the pipeline between the purification bed desorption inlet valve the intercommunication be connected with the branch pipeline and install cooling discharge valve, cooling condenser, cooling inlet valve in proper order, and finally insert central heat exchanger with on the pipeline between the isolation valve behind the heat transfer, the cooling condenser with the intercommunication is connected with branch pipeline and installs the cooling valve on it between the cooling inlet valve, and finally inserts the cooling fan with on the pipeline between the isolation valve before the heat transfer.
As a preferable scheme of the invention, the adsorption purification bed is provided with purification bed temperature sensors, and the total installation number of the adsorption purification beds is not less than two.
In a preferred embodiment of the present invention, a concentration bed temperature sensor is attached to the concentration bed.
As a preferable scheme of the invention, the process flow of the adsorption, desorption and emission treatment of the waste gas by the recovery device in the step two comprises an adsorption purification process, adsorption purification bed desorption, energy-saving temperature reduction of the adsorption purification bed, independent temperature reduction of the adsorption purification bed and independent desorption of the concentration bed.
In a preferred embodiment of the present invention, the temperature reduction fan and the desorption fan are operated in series during desorption of the adsorption purification bed.
As a preferable scheme of the invention, when the energy-saving temperature reduction process of the adsorption purification bed is carried out, the independent desorption process of the concentration bed is started at the same time, and the temperature reduction fan and the desorption fan are operated in parallel.
The invention has the beneficial effects that: the process provided by the invention is used for burning residual substances to meet the zero emission requirement after volatile organic compounds are recycled, and mainly aims to effectively combine a recycling mode and a burning treatment mode in series, so that residual organic waste gas obtained after condensation and recovery of an organic solvent analyzed in a recycling method is directly sent to burning equipment for burning, thereby recycling the organic solvent, reducing the purchase cost of the organic solvent of a production enterprise, achieving full burning and greatly reducing the carbon emission. In the recovery process of the recovery equipment, the series-parallel operation of the system process is realized by switching the series-parallel operation modes of the cooling fan and the desorption fan, the heat energy generated when the adsorption purification bed is cooled is used for desorption heating of the concentration bed through the central heat exchanger, the heat energy generated after the temperature rise and desorption of the concentration bed returns to the adsorption purification bed for desorption heating, the heat energy of the whole process flow of the temperature rise and desorption of the concentration bed is recycled, the desorption heating cost is saved by more than 30%, the cycle period is shortened by more than 40%, the recovery capacity is improved by more than 40%, and the recovery equipment has good environmental protection benefits and economic benefits.
Drawings
FIG. 1 is a schematic view of the connection of the processing equipment of the present invention;
FIG. 2 is a schematic view showing the connection of the recycling apparatus of the present invention.
In the figure: a production workshop, b recovery equipment, c combustion equipment, d communication pipeline, e heat energy conveying pipeline, f exhaust pipe, 1VOCs detection valve, 2 after-heating isolation valve, 3 heater, 4 purification bed desorption inlet valve, 5 purification bed adsorption outlet valve, 6 temperature reduction outlet valve, 7 temperature reduction condenser, 8 temperature reduction inlet valve, 9 concentration bed desorption inlet valve, 10 concentration bed adsorption outlet valve, 11 bypass valve, 12 purification bed desorption outlet valve, 13 purification bed nitrogen valve, 14 concentration bed heat exchange valve, 15 concentration bed adsorption inlet valve, 16 purification bed adsorption inlet valve, 17 secondary desorption outlet valve, 18 before-heat-exchange isolation valve, 19 center heat exchanger, 20 after-heat-exchange isolation valve, 21 main condenser, 22 after-condensation valve, 23 after-condensation heat exchange valve, 24 desorption nitrogen supplement valve, 25 temperature reduction valve, 26 adsorption purification bed, 27 purification bed temperature sensor, 28 pretreatment equipment, 29 adsorption fan, 30 temperature reduction fan, 30 cooling fan, 31 concentration bed, 32 concentration bed temperature sensor, 33 desorption fan, 34 oxygen content detector, 35 hot air temperature sensor, 36 desorption pressure sensor, 37 recovery pipeline, 38 waste gas inlet pipe, 39 nitrogen gas inlet pipe and 40 discharge pipeline.
Detailed Description
Example 1
As shown in figure 1, the organic waste gas series treatment process adopts the technical scheme that the process comprises the following steps:
the method comprises the following steps: a waste gas discharge port of the production workshop a is communicated and connected with a recovery device b through a communication pipeline d, and organic substances in waste gas are adsorbed and desorbed through the recovery device b;
step two: the exhaust port of the recovery device b is communicated and connected with a combustion device c through a communication pipeline d, the exhaust port of the recovery device b is simultaneously communicated and connected with an exhaust pipe f, the recovery device b finishes treatment on waste gas according to adsorption, desorption and exhaust process flows, gas which meets the exhaust standard is directly exhausted through the exhaust pipe f, and gas which does not meet the exhaust standard is introduced into the combustion device c;
step three: introducing the gas containing the organic waste gas into the combustion equipment c to perform combustion treatment in the combustion equipment c;
step four: communicating the gas reaching the standard after being fully combusted by the combustion equipment c to an exhaust pipe f and discharging the gas;
step five: and respectively conveying the heat energy generated by the combustion of the combustion equipment c to a production workshop a and a recovery device b through a heat energy conveying pipeline e so as to fully utilize the heat energy generated by the combustion equipment c.
The process flow of the adsorption, desorption and emission treatment of the waste gas by the recovery device (b) in the second step comprises an adsorption purification process, adsorption purification bed desorption, energy-saving cooling of the adsorption purification bed, independent cooling of the adsorption purification bed and independent desorption of the concentration bed, as shown in fig. 2, the process flow specifically comprises the following steps:
an adsorption purification process: the system is provided with a plurality of adsorption purification beds 26 which work in parallel to adsorb and purify the industrial waste gas containing volatile organic compounds, the industrial waste gas containing volatile organic compounds is firstly cooled and dedusted by a pretreatment device 28, and is pressurized by an adsorption fan 29 and sent to the adsorption purification beds 26 for adsorption and purification. VOCs concentration in the purification bed exhaust gas is detected in real time by the VOCs detection valve 1, when the VOCs concentration detected by the VOCs detection valve 1 reaches a set value, the standby adsorption purification bed 26 is started to perform adsorption purification, at this time, the adsorption purification bed 26 saturated in adsorption enters the analysis waiting state, and therefore the VOCs content in the purification bed exhaust gas is always kept below the set value.
Desorption by an adsorption purification bed: after the adsorption purification bed 26 enters the desorption process, the adsorption discharge valve 5 of the purification bed is firstly opened, then the nitrogen valve 13 of the purification bed is opened to keep the gas path smooth, nitrogen enters the adsorption purification bed 26 through the nitrogen valve 13 of the purification bed, and the nitrogen which replaces the gas in the adsorption purification bed 26 with the nitrogen with the oxygen content less than 7 percent is discharged from the adsorption discharge valve 5 of the purification bed. Then, the purification bed exhaust valve 5 and the purification bed nitrogen valve 13 are closed, meanwhile, the purification bed desorption inlet valve 4, the purification bed desorption outlet valve 12, the isolation valve 18 before heat exchange, the isolation valve 20 after heat exchange, the valve 22 after condensation, the adsorption inlet valve 15 of the concentration bed, the adsorption exhaust valve 10 of the concentration bed and the isolation valve 2 after heating are opened, the cooling fan 30 and the desorption fan 33 are started, and the system forms a series desorption loop; after the cooling fan 30 and the desorption fan 33 are started, the oxygen content detector 34 and the desorption pressure sensor 36 detect the oxygen content and the system pressure in the system in real time, when the oxygen content in the system is larger than a safety value or the system pressure is lower than a set value, the nitrogen system supplements nitrogen to the desorption system through the desorption nitrogen supplement valve 24, the system pressure is larger than the set value, after the oxygen content in the system is smaller than the set value, a heater 3 and a main condenser 21 refrigerant are started, the system enters a process flow of circulating heating, condensing, desorbing and recovering organic matters, and volatile matters in desorption air flow of the adsorption purification bed 26 are discharged from a recovery pipeline 37 after being condensed and recovered in the main condenser 21. The non-condensable gas enters a concentration bed 31 for adsorption and purification, and after the adsorption and purification of the non-condensable gas by the concentration bed 31, the circulating desorption gas flow is converted into high-purity nitrogen and returns to the heater 3 for heating. The hot air temperature sensor 35 controls the heating medium supply of the heater 3 through an automatic control system, keeps the temperature of the circulating desorption nitrogen at the outlet of the heater 3 as a set value, and returns the circulating desorption nitrogen to the adsorption purification bed 26 after being heated by the heater 3 for circulating heating desorption; the purification bed temperature sensor 27 detects the temperature of the desorption gas flow of the adsorption purification bed 26 in real time, and when the temperature of the desorption gas flow of the adsorption purification bed 26 rises to a set value, the desorption process flow of the adsorption purification bed is completed.
Energy-saving and cooling of the adsorption purification bed: after the adsorption purification bed 26 is heated and desorbed, the heated isolation valve 2, the heat exchange isolation valve 20 and the condensed valve 22 are closed, the cooling discharge valve 6 and the cooling inlet valve 8 are opened, the purification bed forms a condensation cooling pipeline through the purification bed desorption inlet valve 4, the purification bed desorption discharge valve 12 and the cooling fan, the isolation valve 18 before heat exchange, the central heat exchanger 19, the cooling inlet valve 8, the cooling condenser 7 and the cooling discharge valve 6, the cooling condenser 7 is opened for supplying refrigerant, and the purification bed enters a circulating cooling process flow; meanwhile, the system starts a heating desorption and condensation recovery pipeline consisting of a concentrated bed desorption inlet valve 9, a concentrated bed desorption discharge valve 17, a main condenser 21, a condensed heat exchange valve 23, a bypass valve 11, a desorption fan and a heater 3, volatile organic matters in high-concentration circulating gas at a desorption outlet of a concentrated bed 31 are condensed and recovered in the main condenser 21 and then discharged, the low-temperature non-condensable gas is mainly condensed, the low-temperature non-condensable gas is discharged from the main condenser 21 and returns to an inlet at the cold end of a central heat exchanger 19 through the condensed heat exchange valve 23 and a corresponding process pipeline, high-temperature gas flow of an adsorption purification bed 26 and low-temperature desorption gas flow of the concentrated bed 31 are subjected to heat energy exchange in the central heat exchanger 19, the high-temperature gas flow of the concentrated bed 31 passes through the bypass valve 11 after heating, the desorption fan 33 is pressurized and returns to the concentrated bed desorption inlet valve 9 after heating of the heater 3, and the concentrated bed 31 is subjected to cyclic heating. After the temperature of the adsorption purification bed 26 is reduced in the central heat exchanger 19, the temperature of the air flow is reduced by the temperature reduction condenser 7 and returns to the adsorption purification bed 26, and the adsorption purification bed 26 is circularly cooled. The high-temperature cooling air flow of the adsorption purification bed 26 and the low-temperature desorption air flow of the concentration bed 31 are subjected to high-efficiency heat exchange recovery through the central heat exchanger 19, so that the first heat energy recycling is realized.
Independently cooling the adsorption purification bed: along with the energy-saving cooling of the adsorption purification bed and the progress of the desorption process flow of the concentration bed, the temperature of the adsorption purification bed 26 is detected to be gradually reduced by the purification bed temperature sensor 27, meanwhile, the temperature of the concentration bed 31 is detected to be gradually increased by the concentration bed temperature sensor 32, when the temperature of the cooling outlet of the purification bed is lower than the temperature of the desorption outlet of the concentration bed, the cooling valve 25 is opened, the cooling inlet valve 8 and the isolation valve 18 before heat exchange are closed, and the adsorption purification bed 26 is switched to an independent cooling process flow; and when the temperature of the cooling outlet of the purification bed is reduced to a specified safety value, closing a system valve, completely finishing the desorption process of the purification bed, recovering the environmental protection treatment capability of the purification bed after the cooling is finished, and transferring to an adsorption purification waiting or adsorption purification process.
Independent desorption of the concentration bed: after the adsorption purification bed 26 is switched to the independent cooling process, the isolation valve 20 after heat exchange and the heat exchange valve 14 of the concentration bed are opened, the desorption valve 17 of the concentration bed is closed, and the concentration bed 31 is switched to the independent desorption process. The gas-gas heat exchange of the desorption gas flow of the concentration bed 31 in the central heat exchanger 19 is realized, and the secondary energy recovery and utilization are realized. The low-temperature non-condensable gas discharged by the main condenser 21 is preheated in the central heat exchanger 19, and the preheated non-condensable gas passes through the bypass valve 11, the desorption fan 33, the heater 3 and the concentration bed desorption valve 9 and returns to the concentration bed 31 for circulating desorption. The high-temperature gas flow at the desorption outlet of the concentration bed is pre-cooled in the central heat exchanger 19, the pre-cooled low-temperature gas enters the main condenser 21 to be condensed and recycled for volatile organic compounds, and the volatile organic compounds are discharged from the recycling pipeline 37 after being condensed and recycled. With the continuous progress of the desorption process flow of the concentration bed, after the temperature of the desorption outlet of the concentration bed rises to a set value, the supply of the heating medium of the heater and the refrigerant of the condenser is closed, the process valve of the system is closed, the desorption fan 33 is stopped, and the desorption of the concentration bed 31 is finished.
In the continuous adsorption concentration-heating desorption process flow of the concentration bed 31, a large amount of high-quality heat energy is contained in the concentration bed 31 after heating desorption, and in the adsorption purification bed desorption process flow, the part of heat energy returns to the adsorption purification bed 26 through the concentration bed adsorption discharge valve 10, the desorption fan 33, the heater 3 and the purification bed desorption inlet valve 4 to be heated and desorbed, so that the low-three-time cyclic utilization of the heat energy is realized.
Components not described in detail herein are prior art.
Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The organic waste gas series treatment process is characterized by comprising the following steps:
the method comprises the following steps: the method comprises the following steps of (a) connecting a waste gas discharge port of a production workshop (a) with a recovery device (b) through a communication pipeline (d), and adsorbing and desorbing organic substances in waste gas through the recovery device (b);
step two: the exhaust port of the recovery device (b) is communicated and connected with the combustion device (c) through a communication pipeline (d), the exhaust port of the recovery device (b) is simultaneously communicated and connected with an exhaust pipe (f), the recovery device (b) finishes treatment on waste gas according to adsorption, desorption and discharge process flows, gas meeting the discharge standard is directly discharged through the exhaust pipe (f), and gas not meeting the discharge standard is introduced into the combustion device (c);
step three: the gas containing the organic waste gas introduced into the combustion equipment (c) is subjected to combustion treatment in the combustion equipment (c);
step four: communicating the gas reaching the standard after the full combustion of the combustion equipment (c) to an exhaust pipe (f) and discharging the gas;
step five: and (c) respectively conveying the heat energy generated by the combustion of the combustion equipment (c) to a production workshop (a) and a recovery device (b) through a heat energy conveying pipeline (e) so as to fully utilize the heat energy generated by the combustion equipment (c).
2. The organic waste gas series treatment process according to claim 1, characterized in that: recovery plant (b) is including heater (3), cooling condenser (7), central heat exchanger (19), main condenser (21), adsorb and purify bed (26), preprocessing equipment (28), concentrated bed (31), oxygen content detector (34), hot-blast temperature sensor (35), desorption pressure sensor (36), preprocessing equipment (28) access connection has waste gas intake pipe (38), and the export is connected with adsorption fan (29) through the pipeline intercommunication, the air outlet of adsorption fan (29) passes through the pipeline intercommunication and connects the air inlet that adsorbs to purify bed (26) and install on the pipeline and purify bed and adsorb inlet valve (16), the gas outlet intercommunication that adsorbs to purify bed (26) is connected with discharge line (40), install on discharge line (40) and purify bed and adsorb outlet valve (5), purify bed adsorb outlet valve (5) with discharge line (40) export lug connection have branch road pipeline and install VOCs on it and go up and install VOCs A check valve (1); a desorption nitrogen supplement valve (24), a bypass valve (11), a desorption fan (33), an oxygen content detector (34), a heater (3), a hot air temperature sensor (35), a heated isolation valve (2), a desorption pressure sensor (36) and a purification bed desorption valve (4) are sequentially connected to the nitrogen inlet pipe (39) in series and communicated with an air outlet of the adsorption purification bed (26); insert into in recovery plant (b) in proper order on heat energy conveying pipeline (e) series connection have cooling fan (30), before the heat transfer isolation valve (18), central heat exchanger (19), heat transfer isolation valve (20), main condenser (21), valve (22) after the condensation, and the intercommunication is connected desorption is mended nitrogen valve (24) with between bypass valve (11) on nitrogen gas intake pipe (39), the import of heat energy conveying pipeline (e) with intercommunication between cooling fan (30) is connected with the branch pipe and installs on the branch pipe and purifies bed desorption exhaust valve (12) and the intercommunication is connected to adsorb the air inlet department that purifies bed (26), the air inlet of nitrogen gas intake pipe (39) with it connects through the branch pipe intercommunication between desorption nitrogen valve (24) adsorb the air inlet of bed (26) and install on the branch pipe and purify bed valve (13), the desorption nitrogen supplement valve (24) is connected with the outlet of the central heat exchanger (19) through a pipeline in the nitrogen inlet pipe (39) between the condensation rear valves (22), the inlet of the central heat exchanger (19) is connected with the condensation rear heat exchange valve (23) through a pipeline and is communicated with the outlet of the main condenser (21), the condensation rear valves (22) and the bypass valve (11) are sequentially connected with the concentrated bed adsorption inlet valve (15) and the concentrated bed heat exchange valve (14) through branch pipelines in the nitrogen inlet pipe (39) and are finally communicated and connected with the inlet of the central heat exchanger (19), one end of the secondary desorption exhaust valve (17) is connected with the concentrated bed adsorption inlet valve (15) and the pipeline between the concentrated bed heat exchange valves (14), the other end of the secondary desorption exhaust valve is connected with the pipeline between the heat exchange rear isolation valve (20) and the main condenser (21), be connected with recovery pipeline (37) on main condenser (21), hot-blast temperature sensor (35) correspond the position nitrogen gas intake pipe (39) are gone up the intercommunication and are connected with the branch pipeline and install concentrated bed desorption inlet valve (9), concentrated bed absorption discharge valve (10) in proper order, final follow bypass valve (11) with insert between desorption fan (33) on nitrogen gas intake pipe (39), concentrated bed (31) import intercommunication is inserted concentrated bed absorption inlet valve (15) with on the pipeline between concentrated bed heat exchange valve (14), export intercommunication is inserted concentrated bed desorption inlet valve (9) with on the pipeline between concentrated bed absorption discharge valve (10), desorption pressure sensor (36) with on the pipeline between purification bed desorption inlet valve (4) the intercommunication be connected with the branch pipeline and install cooling discharge valve (6) in proper order, Valve (8) are advanced in cooling condenser (7), cooling, and finally insert central heat exchanger (19) with on the pipeline between isolation valve (20) behind the heat transfer, cooling condenser (7) with the cooling is advanced the intercommunication between valve (8) and is connected with branch pipeline and install cooling valve (25) on it to finally insert cooling fan (30) with on the pipeline between isolation valve (18) before the heat transfer.
3. The organic waste gas series treatment process according to claim 2, characterized in that: the adsorption purification bed (26) is provided with a purification bed temperature sensor (27), and the total installation number of the adsorption purification bed (26) is not less than two.
4. The organic waste gas series treatment process according to claim 2, characterized in that: and a concentration bed temperature sensor (32) is arranged on the concentration bed (31).
5. The organic waste gas series treatment process according to claim 2, characterized in that: and in the second step, the process flow of the adsorption desorption and emission treatment of the waste gas by the recovery device (b) comprises an adsorption purification process, adsorption purification bed desorption, energy-saving cooling of the adsorption purification bed, independent cooling of the adsorption purification bed and independent desorption of a concentration bed.
6. The organic waste gas series treatment process according to claim 5, characterized in that: the cooling fan (30) and the desorption fan (33) are connected in series to operate in the desorption process of the adsorption purification bed.
7. The organic waste gas series treatment process according to claim 5, characterized in that: when the energy-saving and temperature-reducing process of the adsorption purification bed is carried out, the independent desorption process of the concentration bed is started at the same time, and the temperature-reducing fan (30) and the desorption fan (33) are operated in parallel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116492809A (en) * | 2023-05-22 | 2023-07-28 | 华澄(江门)环保装备科技有限公司 | Waste gas fixed bed desorption energy-saving device |
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Application publication date: 20210810 |