CN108211664A - A kind of organic exhaust gas reclaimer and its application method - Google Patents
A kind of organic exhaust gas reclaimer and its application method Download PDFInfo
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- CN108211664A CN108211664A CN201810115997.3A CN201810115997A CN108211664A CN 108211664 A CN108211664 A CN 108211664A CN 201810115997 A CN201810115997 A CN 201810115997A CN 108211664 A CN108211664 A CN 108211664A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 88
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000007789 gas Substances 0.000 claims abstract description 59
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 42
- 238000009833 condensation Methods 0.000 claims abstract description 24
- 230000005494 condensation Effects 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 238000003795 desorption Methods 0.000 claims abstract description 20
- 239000002912 waste gas Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001179 sorption measurement Methods 0.000 claims description 60
- 239000010815 organic waste Substances 0.000 claims description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- 239000001301 oxygen Substances 0.000 claims description 27
- 229910052760 oxygen Inorganic materials 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000008235 industrial water Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 238000012806 monitoring device Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 2
- 239000003463 adsorbent Substances 0.000 abstract 2
- 239000005416 organic matter Substances 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 description 1
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 description 1
- 102100021133 Nuclear protein 1 Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- B01D53/04—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 with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/0072—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with filtration
-
- 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
- B01D53/002—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 condensation
-
- 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
- B01D53/04—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 with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
A kind of organic exhaust gas reclaimer and its application method, including waste gas pre-treating device, main air blower device, adsorbent equipment, desorption condensing unit, control device；The present invention is by setting the waste gas pre-treating device for the control that cooperates, main air blower device, adsorbent equipment, being desorbed condensing unit, control device, realize high temperature hot nitrogen desorption, cryogenic condensation recycling organic matter, the organic matter water content of recycling is low, does not generate secondary pollution, and operating cost is low；Through collecting the exhaust gas removal rate into system up to more than 95%；Special-purpose activated charcoal is recycled using gas-solvent, the rate of recovery is high, and activated carbon service life is long；PAS nitrogen making machine groups are configured, available for no vapour source occasion.
Description
Technical Field
The invention relates to the field of waste gas recovery, in particular to organic waste gas recovery equipment and a using method thereof.
Background
The organic component of the exhaust gas is non-methane total hydrocarbons (NMHC), which generally refers to all volatile hydrocarbons (mainly C2-C8) except methane, also called non-methane total hydrocarbons. The NMHC in the atmosphere has a certain concentration, is directly harmful to human health, and can generate photochemical smog under certain conditions through sunlight irradiation, thereby causing harm to the environment and human beings. The temperature of the organic waste gas is about 90-110 ℃, and the concentration of organic matters in the waste gas is 15ppm (about 60mg/m 3).
Although there are many organic waste gas recovery devices in the prior art, most early warning mechanisms are not perfect enough, and there are potential safety hazards all the time.
Disclosure of Invention
The invention provides organic waste gas recovery equipment and a using method thereof, and mainly aims to overcome the defects of insufficient early warning mechanism and potential safety hazard of the conventional organic waste gas recovery equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
an organic waste gas recovery device comprises a waste gas pretreatment device, a main fan device, an adsorption device, a desorption and condensation device and a control device;
the waste gas pretreatment device comprises a filter, a cooler, a cooling water tower and a circulating pump, wherein the filter and the cooler are sequentially connected; the cooling water tower is connected with the circulating pump and used for cooling the waste gas in the cooler; a filter screen pressure loss detector is arranged on the filter and is used for automatically giving an alarm when the pressure of the organic waste gas is changed due to blockage or rupture of the filter screen;
the main fan device is a high-pressure centrifugal fan and is used for pumping the waste gas in the cooler into the adsorption device; the high-pressure centrifugal fan is provided with a pressure monitoring device which is used for automatically giving an alarm when the pressure of compressed air in the high-pressure centrifugal fan is monitored to be lower than 6kg/cm 2;
the adsorption device comprises three adsorption tanks arranged side by side, each adsorption tank is internally provided with an active carbon bed layer for adsorbing organic waste gas, and each adsorption tank is also internally provided with an oxygen content detector and a temperature alarm and interlock system which can automatically alarm when the temperature of the active carbon bed layer rises to a dangerous range and send a signal to the control device to control the desorption and condensation device to act;
the desorption and condensation device comprises a PSA nitrogen making unit, a condensation mechanism, a circulating fan and a heater which are connected in sequence, wherein the condensation mechanism and the heater are both communicated with the three adsorption tanks; when the oxygen content detector detects that the weight percentage content of oxygen exceeds 5%, starting a PSA nitrogen making unit to purge the activated carbon bed layer; when the oxygen content detector detects that the weight percentage of oxygen is lower than 3%, the PSA nitrogen making unit stops, and the heater and the circulating fan are started simultaneously to perform inner circulation heating.
Further, still including install in the high temperature fire control watering system on the adsorption tank outside limit, temperature warning, interlock system can rise to when exceeding the dangerous scope at the temperature of active carbon bed, send the signal for controlling means makes its control high temperature fire control watering system towards the corresponding adsorption tank watering.
Furthermore, an emergency exhaust valve is communicated between the cooler and the high-pressure centrifugal fan, and the pressure monitoring device automatically gives an alarm when detecting that the high-pressure centrifugal fan is overloaded and sends a signal to the control device to control the emergency exhaust valve to exhaust the organic waste gas.
Further, the condensing mechanism comprises a first-stage condenser and a second-stage condenser which are connected in a circulating mode, and the first-stage condenser is communicated with the PSA nitrogen making unit and the circulating fan.
The industrial water chilling unit is internally provided with a water pressure detector and a temperature detector, the water pressure detector is used for giving an alarm when the water pressure in the industrial water chilling unit is detected to be insufficient, and the temperature detector is used for giving an alarm when the water temperature in the industrial water chilling unit is detected to be over a preset value.
Further, the device also comprises a solvent storage tank connected with the secondary condenser and used for collecting the solvent liquid condensed by the secondary condenser.
Furthermore, the desorption condensing device further comprises a pressure gauge and a safety discharge pipe, wherein the pressure gauge is used for detecting the nitrogen pressure in the nitrogen transmission pipeline, and the control device controls the safety discharge pipe to discharge the nitrogen when detecting the nitrogen overpressure.
A use method of an organic waste gas recovery device comprises the following steps:
1) firstly, conveying the organic waste gas into a filter to remove large-particle impurities, and then continuously conveying the organic waste gas into a cooler to be cooled to below 40 ℃;
2) after the organic waste gas is cooled, the organic waste gas is pumped into an adsorption tank which is performing adsorption work through a high-pressure centrifugal fan, the organic waste gas is adsorbed in pores by activated carbon when passing through an activated carbon bed layer in the adsorption tank, and tail gas meeting the emission requirement is discharged to the atmosphere through a discharge port at the top of the adsorption tank;
3) the adsorption tank adsorbs for a period of time, and when the oxygen content detector in the adsorption tank detects that the weight percentage content of oxygen exceeds 5%, the control device controls the PSA nitrogen making unit to start, so that nitrogen sequentially passes through the condensing mechanism, the circulating fan and the heater to enter the adsorption tank to purge an active carbon bed layer in the adsorption tank; when the oxygen content detector detects that the weight percentage content of oxygen is lower than 3%, the PSA nitrogen making unit stops, and a heater and a circulating fan are started simultaneously to perform inner circulation heating, so that nitrogen in the PSA nitrogen making unit can be used as a gas solvent to regenerate the activated carbon;
4) after the activated carbon is regenerated, the organic solvent mixed steam desorbed from the surface of the activated carbon bed layer falls into a condensing mechanism to be condensed into solvent liquid, the solvent liquid enters a solvent storage tank, and the uncondensed mixed gas is conveyed to a circulating fan again to be circularly heated or enters other adsorption tanks which are adsorbing continuously.
Compared with the prior art, the invention has the beneficial effects that:
the device has a simple structure and strong practicability, realizes high-temperature thermal nitrogen desorption and low-temperature condensation to recover organic matters by arranging the waste gas pretreatment device, the main blower device, the adsorption device, the desorption condensation device and the control device which are mutually matched and controlled, and has low water content of the recovered organic matters, no secondary pollution and low operation cost; the removal rate of the waste gas entering the system after collection can reach more than 95%; the special activated carbon is recovered by adopting the gas solvent, so that the recovery rate is high, and the service life of the activated carbon is long; the PAS nitrogen making unit is configured and can be used in occasions without steam sources.
Drawings
FIG. 1 is a block diagram of the workflow of the present invention.
FIG. 2 is a block diagram of the operation of the exhaust gas pretreatment device and the main blower device according to the present invention.
Fig. 3 is a first flow chart of the adsorption device and the desorption and condensation device of the present invention.
Fig. 4 is a second flow chart of the adsorption device and the desorption and condensation device of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Reference is made to fig. 1, 2, 3 and 4. An organic waste gas recovery device comprises a waste gas pretreatment device 1, a main fan device 2, an adsorption device 3, a desorption condensation device 4 and a control device 5; wherein,
the waste gas pretreatment device 1 comprises a filter 11, a cooler 12, a cooling water tower 13 and a circulating pump 14, wherein the filter 11 and the cooler 12 are sequentially connected; the cooling water tower 13 is connected with a circulating pump 14 and is used for cooling the waste gas in the cooler 12; a filter screen pressure loss detector 15 is arranged on the filter 11 and is used for automatically giving an alarm when the pressure of the organic waste gas changes due to blockage or rupture of the filter screen, and an operator needs to replace the filter screen in time;
the main fan device 2 is a high-pressure centrifugal fan 21 for pumping the waste gas in the cooler 12 into the adsorption device 3; in order to realize automatic control, all valves are pneumatically controlled, and when the pressure of compressed air is insufficient, the high-pressure centrifugal fan cannot be started to operate, so that the high-pressure centrifugal fan 21 is provided with the pressure monitoring device 22 which is used for automatically giving an alarm when the pressure of the compressed air in the high-pressure centrifugal fan 21 is monitored to be lower than 6kg/cm 2;
the adsorption device 3 comprises three adsorption tanks 31 arranged side by side, each adsorption tank is internally provided with an active carbon bed layer 32 for adsorbing organic waste gas, each adsorption tank is internally provided with an oxygen content detector 33 and a temperature alarm and interlocking system 34, and the temperature alarm and interlocking system 34 can automatically alarm when the temperature of the active carbon bed layer 32 rises to a dangerous range and send a signal to the control device 5 to control the desorption and condensation device 4 to act;
the desorption and condensation device 4 comprises a PSA nitrogen making unit 41, a condensation mechanism 42, a circulating fan 43 and a heater 44 which are connected in sequence, wherein the condensation mechanism 42 and the heater 44 are communicated with the three adsorption tanks 31; when the oxygen content detector 33 detects that the weight percentage content of oxygen exceeds 5%, starting the PSA nitrogen making unit to purge the activated carbon bed layer 32; when the oxygen content detector 33 detects that the weight percentage content of oxygen is lower than 3%, the PSA nitrogen making unit 41 stops, and the heater 44 and the circulating fan 43 are simultaneously started to carry out internal circulation heating, at the moment, the adsorption tank 31, the condensing mechanism 42, the circulating fan 43 and the heater 44 form a closed circulation pipeline.
The control device 5 is composed of a PLC, a touch screen, a frequency converter, an electromagnetic valve, a pneumatic pump, various sensors, a detector and a transmitter. The PLC adopts a DVP series programmable controller and is connected with a touch screen COM1 through an RS232 port for communication, thereby realizing human-computer interaction and completing all operation and display functions; meanwhile, the RS485 interface of the PLC is communicated with the frequency converter, and the touch screen software displays, records, stores and processes real-time data in the PLC, so that various monitoring requirements are met.
Through the arrangement of the waste gas pretreatment device 1, the main fan device 2, the adsorption device 3, the desorption and condensation device 4 and the control device 5 which are mutually matched and controlled, the organic matters are recovered through high-temperature thermal nitrogen desorption and low-temperature condensation, the water content of the recovered organic matters is low, secondary pollution is not generated, and the operation cost is low; the removal rate of the waste gas entering the system after collection can reach more than 95%; the special activated carbon is recovered by adopting the gas solvent, so that the recovery rate is high, and the service life of the activated carbon is long; the PAS nitrogen making unit 41 is configured and can be used in the occasions without steam sources.
Reference is made to fig. 1, 2, 3 and 4. Still including installing the high temperature fire control watering system 35 on the outside limit of adsorption tank 31, temperature warning, interlock system 34 can be when the temperature of active carbon bed 32 rises to surpassing dangerous scope, with signal transmission for controlling means 5 make its control high temperature fire control watering system 35 towards the watering of corresponding adsorption tank 31, ensure that the active carbon temperature can not continue to rise and endanger safety.
Reference is made to fig. 1, 2, 3 and 4. An emergency exhaust valve 6 is communicated between the cooler 12 and the high-pressure centrifugal fan 21, and when the pressure monitoring device 22 detects that the high-pressure centrifugal fan 21 is overloaded, the pressure monitoring device automatically gives an alarm and sends a signal to the control device 5 to control the emergency exhaust valve 6 to exhaust the organic waste gas.
Reference is made to fig. 1, 2, 3 and 4. The condensing mechanism 42 comprises a first-stage condenser 421 and a second-stage condenser 422 which are circularly connected, and the first-stage condenser 421 is communicated with the PSA nitrogen making unit 41 and the circulating fan 43.
Reference is made to fig. 1, 2, 3 and 4. The industrial water chilling unit 7 is used for condensing organic waste gas in the secondary condenser 422, a water pressure detector 71 and a temperature detector 72 are arranged in the industrial water chilling unit 7, the water pressure detector 71 is used for giving an alarm when the water pressure in the industrial water chilling unit 7 is detected to be insufficient, and the temperature detector 72 is used for giving an alarm when the water temperature in the industrial water chilling unit 7 is detected to exceed a preset value, so that a good recovery effect can be achieved.
Reference is made to fig. 1, 2, 3 and 4. And a solvent storage tank 8 connected with the secondary condenser 422 and used for collecting the solvent liquid condensed by the secondary condenser 422.
Reference is made to fig. 1, 2, 3 and 4. The desorption condensation device 4 further comprises a pressure gauge 45 and a safety discharge pipe 46, which are installed on a closed circulation pipeline (i.e. a nitrogen transmission pipeline) formed by the adsorption tank 31, the condensation mechanism 42, the circulation fan 43 and the heater 44. The pressure gauge 45 is used for detecting the pressure of the nitrogen gas in the nitrogen gas transmission pipeline, and the control device 5 controls the safety discharge pipe 46 to discharge the nitrogen gas when detecting the overpressure of the nitrogen gas.
Reference is made to fig. 1, 2, 3 and 4. A use method of an organic waste gas recovery device comprises the following steps:
step one
The organic waste gas is firstly conveyed into a filter 11 for removing large-particle impurities, and then the organic waste gas is continuously conveyed into a cooler 12 to be cooled to below 40 ℃;
step two
After the organic waste gas is cooled, the organic waste gas is pumped into an adsorption tank 31 which is performing adsorption work through a high-pressure centrifugal fan 21, the organic waste gas is adsorbed in pores by activated carbon when passing through an activated carbon bed layer 32 in the adsorption tank 31, and tail gas which meets the emission requirement is discharged to the atmosphere through a discharge port at the top of the adsorption tank 31;
step three
The adsorption tank 31 is used for adsorbing for a period of time, until the oxygen content detector 33 in the adsorption tank detects that the weight percentage content of oxygen exceeds 5%, the control device controls the PSA nitrogen making unit 41 to be started, so that nitrogen sequentially passes through the condensing mechanism 42, the circulating fan 43 and the heater 44 to enter the adsorption tank 31 to purge the activated carbon bed layer 32 in the adsorption tank 31; when the oxygen content detector 33 detects that the weight percentage content of oxygen is lower than 3%, the PSA nitrogen making unit 41 stops, and simultaneously the heater 44 and the circulating fan 43 are started for internal circulation heating, so that the nitrogen in the PSA nitrogen making unit can be used as a gas solvent to regenerate the activated carbon;
step four
After the activated carbon is regenerated, the organic solvent mixed vapor desorbed from the surface of the activated carbon bed layer 32 falls into the condensing mechanism 42 to be condensed into solvent liquid, the solvent liquid enters the solvent storage tank 8, and the uncondensed mixed gas is conveyed to the circulating fan 43 again to be circularly heated or enters other adsorption tanks 31 which are adsorbing continuously.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (8)
1. An organic waste gas recovery equipment which characterized in that: comprises a waste gas pretreatment device, a main fan device, an adsorption device, a desorption condensation device and a control device;
the waste gas pretreatment device comprises a filter, a cooler, a cooling water tower and a circulating pump, wherein the filter and the cooler are sequentially connected; the cooling water tower is connected with the circulating pump and used for cooling the waste gas in the cooler; a filter screen pressure loss detector is arranged on the filter and is used for automatically giving an alarm when the pressure of the organic waste gas is changed due to blockage or rupture of the filter screen;
the main fan device is a high-pressure centrifugal fan and is used for pumping the waste gas in the cooler into the adsorption device; the high-pressure centrifugal fan is provided with a pressure monitoring device which is used for automatically giving an alarm when the pressure of compressed air in the high-pressure centrifugal fan is monitored to be lower than 6kg/cm 2;
the adsorption device comprises three adsorption tanks arranged side by side, each adsorption tank is internally provided with an active carbon bed layer for adsorbing organic waste gas, and each adsorption tank is also internally provided with an oxygen content detector and a temperature alarm and interlock system which can automatically alarm when the temperature of the active carbon bed layer rises to a dangerous range and send a signal to the control device to control the desorption and condensation device to act;
the desorption and condensation device comprises a PSA nitrogen making unit, a condensation mechanism, a circulating fan and a heater which are connected in sequence, wherein the condensation mechanism and the heater are both communicated with the three adsorption tanks; when the oxygen content detector detects that the weight percentage content of oxygen exceeds 5%, starting a PSA nitrogen making unit to purge the activated carbon bed layer; when the oxygen content detector detects that the weight percentage of oxygen is lower than 3%, the PSA nitrogen making unit stops, and the heater and the circulating fan are started simultaneously to perform inner circulation heating.
2. The organic waste gas recovery apparatus according to claim 1, wherein: still including installing in the high temperature fire control watering system on the adsorption tank outside limit, temperature warning, interlock system can be when the temperature of active carbon bed layer risees to surpassing dangerous scope, give with signal transmission controlling means makes its control high temperature fire control watering system towards the adsorption tank watering that corresponds.
3. The organic waste gas recovery apparatus according to claim 1, wherein: an emergency exhaust valve is communicated between the cooler and the high-pressure centrifugal fan, and the pressure monitoring device automatically alarms when detecting that the high-pressure centrifugal fan is overloaded and sends a signal to the control device to control the emergency exhaust valve to exhaust organic waste gas.
4. The organic waste gas recovery apparatus according to claim 1, wherein: the condensing mechanism comprises a first-stage condenser and a second-stage condenser which are connected in a circulating manner, and the first-stage condenser is communicated with the PSA nitrogen making unit and the circulating fan.
5. The organic waste gas recovery apparatus according to claim 4, wherein: the industrial water chilling unit is used for condensing the organic waste gas in the secondary condenser, a water pressure detector and a temperature detector are arranged in the industrial water chilling unit, the water pressure detector is used for alarming when the water pressure in the industrial water chilling unit is insufficient, and the temperature detector is used for alarming when the water temperature in the industrial water chilling unit is detected to exceed a preset value.
6. The organic waste gas recovery apparatus according to claim 4, wherein: the solvent storage tank is connected with the secondary condenser and is used for collecting the solvent liquid condensed by the secondary condenser.
7. The organic waste gas recovery apparatus according to claim 1, wherein: the desorption condensing device further comprises a pressure gauge and a safety discharge pipe, the pressure gauge is used for detecting the nitrogen pressure in the nitrogen transmission pipeline, and the control device controls the safety discharge pipe to discharge the nitrogen when detecting the nitrogen overpressure.
8. The use method of the organic waste gas recovery equipment is characterized by comprising the following steps:
1) firstly, conveying the organic waste gas into a filter to remove large-particle impurities, and then continuously conveying the organic waste gas into a cooler to be cooled to below 40 ℃;
2) after the organic waste gas is cooled, the organic waste gas is pumped into an adsorption tank which is performing adsorption work through a high-pressure centrifugal fan, the organic waste gas is adsorbed in pores by activated carbon when passing through an activated carbon bed layer in the adsorption tank, and tail gas meeting the emission requirement is discharged to the atmosphere through a discharge port at the top of the adsorption tank;
3) the adsorption tank adsorbs for a period of time, and when the oxygen content detector in the adsorption tank detects that the weight percentage content of oxygen exceeds 5%, the control device controls the PSA nitrogen making unit to start, so that nitrogen sequentially passes through the condensing mechanism, the circulating fan and the heater to enter the adsorption tank to purge an active carbon bed layer in the adsorption tank; when the oxygen content detector detects that the weight percentage content of oxygen is lower than 3%, the PSA nitrogen making unit stops, and a heater and a circulating fan are started simultaneously to perform inner circulation heating, so that nitrogen in the PSA nitrogen making unit can be used as a gas solvent to regenerate the activated carbon;
4) after the activated carbon is regenerated, the organic solvent mixed steam desorbed from the surface of the activated carbon bed layer falls into a condensing mechanism to be condensed into solvent liquid, the solvent liquid enters a solvent storage tank, and the uncondensed mixed gas is conveyed to a circulating fan again to be circularly heated or enters other adsorption tanks which are adsorbing continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810115997.3A CN108211664A (en) | 2018-02-06 | 2018-02-06 | A kind of organic exhaust gas reclaimer and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810115997.3A CN108211664A (en) | 2018-02-06 | 2018-02-06 | A kind of organic exhaust gas reclaimer and its application method |
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| Publication Number | Publication Date |
|---|---|
| CN108211664A true CN108211664A (en) | 2018-06-29 |
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Application publication date: 20180629 |