CN110170209A - The process of the small uniform thermal desorption recycling and administration VOCs gas of air quantity - Google Patents
The process of the small uniform thermal desorption recycling and administration VOCs gas of air quantity Download PDFInfo
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- CN110170209A CN110170209A CN201910616248.3A CN201910616248A CN110170209A CN 110170209 A CN110170209 A CN 110170209A CN 201910616248 A CN201910616248 A CN 201910616248A CN 110170209 A CN110170209 A CN 110170209A
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- 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
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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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- 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
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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
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40043—Purging
- B01D2259/4005—Nature of purge 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
- B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
- B01D2259/40058—Number of sequence steps, including sub-steps, per cycle
- B01D2259/4006—Less than four
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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
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- Treating Waste Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a kind of processes of small uniform thermal desorption recycling and administration VOCs gas of air quantity, comprising the following steps: step 1:VOCs exhaust gas enters the surge tank V01 with coalescence function and automatic back blow filter F L01 is pre-processed；Step 2: when absorption/desorption tank V02A absorption reaches breakthrough point, absorption/desorption tank V02B enters absorption phase, and absorption/desorption tank V02A enters desorption stage；Step 3: absorption/desorption tank V02A enters desorption stage: a: absorption/desorption tank V02A nitrogen displacement；B: absorption/desorption tank V02A desorption；C: absorption/desorption tank V02A nitrogen is replaced again；Step 4: absorption/desorption tank V02A desorption is completed: step 5: step 1- step 4 automatic cycle carries out, absorption/desorption tank V02A and absorption/desorption tank V02B alternating sorbent, desorption, cooling.Oxygen content < 2% is discharged in the present invention, and calorific value is greater than 7880KJ/Nm3, gas of the temperature lower than 50 DEG C.
Description
Technical field
The present invention relates to VOCs master gas, in particular to a kind of uniform thermal desorption recycling and administration VOCs gas of small air quantity
Process.
Background technique
Currently, in petrochemical industry, the VOCs gas for thering are many process units to generate, mostly Wind Volume, low concentration, and
And be unable to direct emission atmosphere, currently, using most processing techniques be catalytic burning and directly burn etc. heat damages method, but
It is relevant national standard, such as GB31572-2013 " synthetic resin industry pollutant emission standard " is, it is specified that burning class VOCs
The actual measurement Air Pollutant Emission concentration of gas discharge outlet must be converted into the atmosphere pollution base platoon that benchmark oxygen content is 3%
Concentration is put, this proposes harsh requirement to the design of such technique, and in practical applications, due to the bad control of oxygen content
System, there are certain risk of exceeding criterion, especially direct combustion method, there is also the high problems of energy consumption.
It carries out directly absorption for such gas application adsorbent to administer, such method can only will reach suction in active carbon
Attached saturation state when soon penetrating, carries out adsorbent replacement, changes the agent period about at 6 to 12 months, generate a large amount of dangerous wastes, together
When higher cost.Therefore under the premise of can satisfy atmosphere emissions requirements, adsorption system is periodically desorbed, desorption is useless
Gas is recycled to petrochemical industry low pressure gas pipe network.To reach energy-saving, the purpose of save the cost.
Existing market thermal desorption technology is varied, but whether thermal desorption gas can satisfy SH3009-2013 " petrochemical industry
Imflammable gas exhaust system design specification " desired oxygen content < 2% and calorific value be greater than 7880KJ/Nm3, and it is final de-
Attached temperature degree can satisfy low pressure gas system and receive temperature, all become the use thermal desorption technology for whether capableing of safety and stability,
Desorption gas is recycled to the key of low pressure gas system.
Summary of the invention
One of the objects of the present invention is to provide a kind of works of small uniform thermal desorption recycling and administration VOCs gas system of air quantity
Oxygen content < 2% is discharged in process, this method, and calorific value is greater than 7880KJ/Nm3, gas of the temperature lower than 50 DEG C.
Technical solution is: a kind of process of the small uniform thermal desorption recycling and administration VOCs gas of air quantity, including following step
It is rapid:
Step 1:VOCs exhaust gas enters the surge tank V01 with coalescence function and automatic back blow filter F L01 is located in advance
Reason, is fed to absorption/desorption tank V02A by pretreated VOCs exhaust gas and is adsorbed, the gas up to standard after adsorption cleaning
Enter chimney chimney Q05 discharge through shut-off valve F04；Another adsorbs/is desorbed tank V02B and is now in desorption stage or spare
Stage guarantees that purification system can be continuously run, does not influence workshop and normally produce；
Step 2: when absorption/desorption tank V02A absorption reaches breakthrough point, closing shut-off valve F02, shut-off valve F14, shut-off valve
F12 and shut-off valve F07, opening shut-off valve F13, shut-off valve F06, shut-off valve F11 and shut-off valve F08 makes absorption/desorption tank V02B
Into absorption phase, absorption/desorption tank V02A enters desorption stage；
Step 3: absorption/desorption tank V02A enters desorption stage:
A: absorption/desorption tank V02A nitrogen displacement: nitrogen supply valve is opened toward absorption/desorption tank V02A and is filled with 99% or more
Nitrogen carry out nitrogen displacement；
B: it absorption/desorption tank V02A desorption: when online oxygen content monitor detects system oxygen concentration less than 0.3%, adjusts
Triple valve FS01 is saved, heating device D01 heated nitrogen is opened, is sent into absorption/desorption tank V02A after nitrogen heating and is desorbed, taken off
Attached gas is sent into adjustment heat value system after cooling down and carries out adjustment heat value, ensures that desorption system is in barotropic state in desorption process,
When system pressure is higher than 300kpa, system automatic adjustment nitrogen supply valve controls nitrogen flow, online oxygen content inspection
The variation of the oxygen content in instrument real-time monitoring system is surveyed, and is handled by DCS system control；
C: absorption/desorption tank V02A nitrogen is replaced again: the sending when line oxygen content monitor detects oxygen content > 1.5%
Alarm, heating device D01 stop heating, and regulating three-way valve FS01 replaces again into nitrogen, when oxygen content≤1.2%, adjust
Triple valve FS01, absorption/desorption tank V02A re-start desorption；
Step 4: absorption/desorption tank V02A desorption is completed: after reaching desorption time, closing nitrogen, heating device D01 and heat
It is worth regulating system, makes active carbon layer of charcoal temperature that adsorbent operating temperature is reduced to make in order to the absorption of subsequent cycle
With；
Step 5: step 1- step 4 automatic cycle carries out, and absorption/desorption tank V02A and absorption/desorption tank V02B alternately inhale
Attached, desorption, cooling.
Preferably, the process of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes heat exchange system
System, the desorption gas carry out before entering adjustment heat value system through the nitrogen before the heat-exchange system and heating device D01 heating
Heat exchange.
Preferably, the gas that cements out of the nitrogen, which is sent into air-introduced machine BL01 through triple valve FS01, enters absorption/take off
Enter chimney chimney Q05 discharge through shut-off valve F04 after attached tank V02B adsorption cleaning.
The second object of the present invention is to provide a kind of uniform thermal desorption recycling and administration VOCs gas system of small air quantity.
Technical solution is: a kind of small uniform thermal desorption recycling and administration VOCs gas of air quantity, and the small air quantity uniform heat is de-
The system of attached recycling and administration VOCs gas includes VOCs gas inlet system, adsorption system, VOCs gas blow-off system up to standard, liquid
Body exhaust system, solid discharge system, desorption gas handling system, desorption system, desorption gas intermediate system, desorption gas discharge system
System and adjustment heat value system, adsorption system respectively with VOCs gas inlet system, liquid-discharging system, solid discharge system and reach
The connection of VOCs gas blow-off system is marked, desorption system is connect with desorption gas handling system and adjustment heat value system respectively, adjustment heat value
System is also connect with desorption gas exhaust system and liquid-discharging system respectively, desorption gas intermediate system respectively with desorption system
It is connected with adjustment heat value system.
Preferably, the VOCs gas inlet system includes VOCs exhaust inlet pipe G03 and VOCs exhaust gas source Q02, it should
VOCs exhaust inlet pipe G03 is connect with VOCs exhaust gas source Q02, and adsorption system includes absorption/desorption tank V02A and absorption/desorption tank
V02B, VOCs exhaust inlet pipe G03 are connect with absorption/desorption tank V02A and absorption/desorption tank V02B respectively, VOCs gas up to standard
Exhaust system includes that VOCs gas discharge pipe G08 and chimney Q05, VOCs gas discharge pipe G08 up to standard and chimney Q05 up to standard connect
It connects, VOCs gas discharge pipe G08 up to standard is also connect with absorption/desorption tank V02A and absorption/desorption tank V02B respectively.
Preferably, the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes pretreatment system,
Pretreatment system is connected on VOCs exhaust inlet pipe G03, and pretreatment system includes surge tank V01, filter F L01 and air inducing
Machine BL01, filter F L01 are arranged between surge tank V01 and air-introduced machine BL01.
Preferably, the pretreatment system further includes fire arrester FA01, fire arrester FA01 setting filter F L01 with
Between air-introduced machine BL01.
Preferably, the desorption gas handling system includes inert gas inleting pipe G01, heating device D01 and inert gas
Source Q04, inert gas inleting pipe G01 are connect with inert gas source Q04, and heating device D01 is connected to inert gas inleting pipe G01
On, desorption system includes the absorption/desorption tank V02A and the absorption/desorption tank V02B, and inert gas inleting pipe G01 also divides
It is not connect with absorption/desorption tank V02A and absorption/desorption tank V02B, desorption gas exhaust system includes desorption gas delivery pipe
G09 and gas pipe network Q06, desorption gas one end delivery pipe G09 are connect with adjustment heat value system, and the other end connects gas pipe network
Q06, desorption gas intermediate system include desorption gas intermediate tube G10, desorption gas intermediate tube G10 respectively with absorption/desorption tank
V02A, absorption/desorption tank V02B are connected with adjustment heat value system, and adjustment heat value system includes adjusting tank V03.
Preferably, the adjustment heat value system further includes fuel gas system, which includes fuel gas source Q01
With fuel air pipe G04, fuel air one end pipe G04 is connect with fuel gas source Q01, and the other end is connect with tank V03 is adjusted.
Preferably, the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes oxygen content monitoring system
Unite O01.
Preferably, the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes that desorption gas is inhaled again
Attached system, adsorption system includes that desorption gas adsorbs return pipe G05 and triple valve FS01 again to desorption gas again, and desorption gas adsorbs again
The one end return pipe G05 is connected with desorption gas intermediate tube G10, and the other end is connect with VOCs exhaust inlet pipe G03.
Preferably, the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes low-pressure steam system
System, steam vapour system prevent thermal loss, steam vapour system includes low pressure steam pipe G02 and low pressure for assisting heating
Vapour source Q03, low pressure steam pipe G02 are connect with low-pressure steam source Q03, low pressure steam pipe G02 also respectively with absorption/desorption tank
V02A, absorption/desorption tank V02B connection.
Preferably, the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity further includes heat-exchange system, change
Hot systems are heat exchanger E01, and heat-exchange system is connect with desorption gas intermediate tube G10 and inert gas inleting pipe G01 respectively.
Compared with prior art, the beneficial effects of the present invention are:
It after present invention desorption starts, is first replaced using small flow nitrogen, when online oxygen content detector shows that oxygen contains
When measuring < 2%, after nitrogen is heated up by electric heater, it is desorbed.The outer tracing system of adsorption tanks/desorption tank makes up thermal loss,
A heat-exchange system is added after desorption gas, heat exchange is carried out by elevated temperature desorption gas and desorption nitrogen, substantially reduces heating system
The consumption of thermal energy in system can greatly reduce the cost of investment and operating cost of enterprise, and the desorption gas after heat exchange enters calorific value tune
Section system is adjusted if calorific value is lower than setting value with fuel gas.To meet the condition for entering gas pipe network.
Term explanation
VOCs-VOCs full name is volatile organic compounds, i.e. volatile organic matter, refers to and is saturated under room temperature
Vapour pressure is greater than that boiling point is at 50~260 DEG C or less under 133.32Pa, standard atmospheric pressure 101.3kPa and initial boiling point is Celsius equal to 250
The organic compound of degree, or the organic solid that can be volatilized any at normal temperatures and pressures or liquid.
Small air quantity-refers to Feng Su≤300m3/h.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" being provided with ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
Embodiment 1
Such as Fig. 1, a kind of system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity, including VOCs gas inlet system
System, adsorption system, VOCs gas blow-off system up to standard, liquid-discharging system, solid discharge system, desorption gas handling system, desorption
System, desorption gas intermediate system, desorption gas exhaust system and adjustment heat value system, adsorption system respectively with VOCs gas into
Gas system, liquid-discharging system, solid discharge system are connected with VOCs gas blow-off system up to standard, and adsorption system is by VOCs gas
Gas handling system and come VOCs gas absorption after, VOCs gas is discharged through VOCs gas blow-off system up to standard, and liquid is arranged through liquid
Place system discharge, desorption system respectively with desorption gas handling system and adjustment heat value system connect, adjustment heat value system also respectively with
Desorption gas exhaust system is connected with liquid-discharging system, desorption gas intermediate system respectively with desorption system and adjustment heat value system
System connection.
Need further exist for explanation, the present invention in, VOCs gas inlet system include VOCs exhaust inlet pipe G03 and
VOCs exhaust gas source Q02, the VOCs exhaust inlet pipe G03 are connect with VOCs exhaust gas source Q02, and adsorption system includes absorption/desorption tank
V02A and absorption/desorption tank V02B, VOCs exhaust inlet pipe G03 respectively with absorption/desorption tank V02A and absorption/desorption tank V02B
Connection, VOCs gas blow-off system up to standard includes VOCs gas discharge pipe G08 and chimney Q05 up to standard, VOCs gas discharge up to standard
Pipe G08 is connect with chimney Q05, VOCs gas discharge pipe G08 up to standard also respectively with absorption/desorption tank V02A and absorption/desorption tank
V02B connection.
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
Including pretreatment system, pretreatment system is connected on VOCs exhaust inlet pipe G03, and pretreatment system includes surge tank V01, mistake
Filter FL01 and air-introduced machine BL01, filter F L01 are arranged between surge tank V01 and air-introduced machine BL01.Surge tank V01 is band
The surge tank of function is coalesced, which is provided with coalescence material.Filter F L01 is automatic back blow filter.Pretreatment system
Most of granule foreign, removes moisture removal in filtration treatment VOCs gas, improves the absorption property of active carbon and extends active carbon
Service life.
It needs further exist for illustrating, in the present invention, pretreatment system further includes fire arrester FA01, fire arrester FA01 setting
In filter F L01 and air-introduced machine BL01.
It needs further exist for illustrating, in the present invention, VOCs gas inlet system is additionally provided with shut-off valve F22, shut-off valve
F23, shut-off valve F14, shut-off valve F11 and shut-off valve F16, VOCs gas blow-off system up to standard further include shut-off valve F02, shut-off valve
F08 and shut-off valve F04.Shut-off valve F22, shut-off valve F23, shut-off valve F14, shut-off valve F11, shut-off valve F16 setting are useless in VOCs
On gas air inlet pipe G03, shut-off valve F22 is located at surge tank V01 inlet end, and shut-off valve F23 is located at the outlet side surge tank V01, cut-off
Valve F14 and shut-off valve F11 are arranged side by side, and shut-off valve F16 is arranged at air-introduced machine BL01 air outlet.Shut-off valve F02, shut-off valve F08 and
Shut-off valve F04 is arranged on VOCs gas discharge pipe G08 up to standard, and shut-off valve F02 and shut-off valve F08 are arranged side by side, and shut-off valve F04 is located at
The outlet side of VOCs gas discharge pipe G08 up to standard.
It needing further exist for illustrating, in the present invention, VOCs gas blow-off system up to standard further includes Concentration Testing table N01,
Concentration Testing table N01 is arranged between shut-off valve F04 and chimney Q05, when Concentration Testing table N01 shows the VOCs gas of discharge not
When up to standard, shut-off valve F04 is closed, into desorption stage.
It needs further exist for illustrating, in the present invention, air-introduced machine BL01 has two, wherein a conduct is spare, when
When air-introduced machine BL01 in use is out of order, another spare air-introduced machine BL01 is enabled.
It needs further exist for illustrating, in the present invention, desorption gas handling system includes inert gas inleting pipe G01, heating dress
D01 and inert gas source Q04 are set, inert gas inleting pipe G01 is connect with inert gas source Q04, and heating device D01 is connected to lazy
On property gas inlet pipe G01, desorption system includes absorption/desorption tank V02A and absorption/desorption tank V02B, inert gas inleting pipe
G01 is also connect with absorption/desorption tank V02A and absorption/desorption tank V02B respectively, and desorption gas exhaust system includes desorption gas
Delivery pipe G09 and gas pipe network Q06, desorption gas one end delivery pipe G09 are connect with adjustment heat value system, and the other end connects gas
Pipe network Q06, desorption gas intermediate system include desorption gas intermediate tube G10, desorption gas intermediate tube G10 respectively with absorption/de-
Attached tank V02A, absorption/desorption tank V02B are connected with adjustment heat value system, and adjustment heat value system includes adjusting tank V03, adjust tank
V03 is by the desorption gas adjustment heat value of entrance to calorific value > 7880KJ/Nm3.
Absorption herein/desorption tank V02A and absorption/desorption tank V02B be adsorption system in absorption/desorption tank V02A and
Absorption/desorption tank V02B is identical, and absorption/desorption tank V02A and absorption/desorption tank V02B, as adsorption tanks, are being desorbed in absorption
Tank is desorbed in Shi Zuowei.
It needs further exist for illustrating, in the present invention, inert gas is nitrogen.
It needs further exist for illustrating, in the present invention, heating device D01 is electric heater.Electric heater is connected with temperature control
Device (prior art), for controlling the Push And Release of electric heater.
It needs further exist for illustrating, in the present invention, adjustment heat value system further includes fuel gas system, the fuel gas system
Including fuel gas source Q01 and fuel air pipe G04, fuel air one end pipe G04 is connect with fuel gas source Q01, the other end and tune
Save tank V03 connection.
Need further exist for explanation, the present invention in, desorption gas handling system be additionally provided with shut-off valve F12, shut-off valve F13,
Shut-off valve F17 and pneumatic operated valve QD01, shut-off valve F12, shut-off valve F13, shut-off valve F17 and pneumatic operated valve QD01 are arranged in inert gas
On air inlet pipe G01, pneumatic operated valve QD01 is located at inert gas inleting pipe G01 inlet end, and shut-off valve F12 and shut-off valve F13 are arranged side by side, cuts
After only valve F13 is located at heating device D01, before shut-off valve F12, shut-off valve F13.Fuel gas system further includes shut-off valve F20, is cut
Only valve F20 is located on fuel air pipe G04, is located at and adjusts at tank V03 air inlet, desorption gas exhaust system further includes shut-off valve
F21, shut-off valve F21 are arranged on desorption gas delivery pipe G09, and desorption gas intermediate system further includes shut-off valve F06, shut-off valve
F07 and shut-off valve F19, shut-off valve F06, shut-off valve F07 and shut-off valve F19 are arranged on desorption gas intermediate tube G10, shut-off valve
F06, shut-off valve are arranged side by side, and shut-off valve F19 is located at after shut-off valve F06, shut-off valve F07.
It needs further exist for illustrating, in the present invention, desorption gas exhaust system further includes control pressurer system, flow control
System processed and sample tap C02, control pressurer system, flow control system and sample tap C02 are connected to desorption gas delivery pipe G09
On, control pressurer system is pressure gauge Y01, and flow control system is flowmeter FI01, and sample tap C02 is located at control pressurer system
Between flow control system.
Pneumatic operated valve QD01 is connect with control mechanism (prior art), the Push And Release of control desorption gas handling system.
Adjustment heat value system further includes pneumatic operated valve QD04, and pneumatic operated valve QD04 is mounted on fuel air pipe G04, the pneumatic operated valve
It is also connected with control mechanism (prior art) between QD04 and desorption gas intermediate tube G10, controls the Push And Release of fuel gas.
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
System O01 is monitored including oxygen content, oxygen content monitoring system O01 is mounted on desorption gas intermediate tube G10, and control system contains
Amount amount, it is online oxygen content testing instrument, oxygen in online oxygen content testing instrument on-line real time monitoring system that oxygen content, which monitors system O01,
The variation of content concn guarantees the desorption gas oxygen content < 2% for entering gas pipe network Q06.
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
Including desorption gas adsorption system again, adsorption system includes that desorption gas adsorbs return pipe G05 again to desorption gas again, and desorption gas is again
Absorption one end return pipe G05 is connected with desorption gas intermediate tube G10, and the other end is connect with VOCs exhaust inlet pipe G03, desorption gas
The junction for adsorbing return pipe G05 and VOCs exhaust inlet pipe G03 again is located at before air-introduced machine BL01, and desorption gas adsorbs return pipe again
G05 and the desorption gas junction intermediate tube G10 are located between oxygen content monitoring system O01 and shut-off valve F19.
It needs further exist for illustrating, in the present invention, adsorption system further includes shut-off valve F18, shut-off valve to desorption gas again
F18 setting is adsorbed on return pipe G05 again in desorption gas.
It needs further exist for illustrating, in the present invention, adsorption system further includes sample tap C01 to desorption gas again.
It needs further exist for illustrating, in the present invention, adsorption system further includes triple valve FS01, triple valve to desorption gas again
FS01 adsorbs return pipe G05 and desorption gas intermediate tube G10 for connecting desorption gas again.
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
Including shut-off valve F03 and shut-off valve F09, shut-off valve F03 and shut-off valve F09 make VOCs gas vent up to standard and the outlet of desorption gas
It is one.
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
Including steam vapour system, steam vapour system prevents thermal loss, steam vapour system includes that low pressure is steamed for assisting heating
Steam pipe G02 and low-pressure steam source Q03, low pressure steam pipe G02 are connect with low-pressure steam source Q03, low pressure steam pipe G02 also respectively with
Absorption/desorption tank V02A, absorption/desorption tank V02B connection.
Need further exist for explanation, the present invention in, steam vapour system further include shut-off valve F03, pneumatic operated valve QD02 and
Pneumatic operated valve QD05, shut-off valve F03, pneumatic operated valve QD02 and pneumatic operated valve QD05 are mounted on low pressure steam pipe G02, pneumatic operated valve QD02 and suction
It is provided with temperature controller (prior art) between attached/desorption tank V02A, is provided between pneumatic operated valve QD05 and absorption/desorption tank V02B
Temperature controller (prior art).
It needs further exist for illustrating, in the present invention, the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity is also
Including heat-exchange system, heat-exchange system is heat exchanger E01, heat-exchange system respectively with desorption gas intermediate tube G10 and inert gas into
Tracheae G01 connection.Heat-exchange system realizes elevated temperature desorption gas and the desorption heat exchange of nitrogen, has two aspect effects: on the one hand right
Elevated temperature desorption gas is tentatively cooled down, and is met and is entered low pressure gas pipe network temperature requirement；It on the other hand can be to the nitrogen of desorption
Tentatively heated, so that electric heating system load is reduced, it is energy-saving.
It needs further exist for illustrating, in the present invention, liquid-discharging system includes liquid discharge pipe GO7, liquid discharge pipe
GO7 and condensed water network management W01, liquid discharge pipe GO7 connection condensed water network management W01, liquid discharge pipe GO7 are also respectively connected with suction
Attached/desorption tank V02A and absorption/desorption tank V02B.
It needs further exist for illustrating, in the present invention, liquid-discharging system further includes shut-off valve F15 and shut-off valve F10, is cut
Only valve F15 and shut-off valve F10 are mounted on liquid discharge pipe GO7, are respectively used to control absorption/desorption tank V02A and absorption/desorption
The liquid of tank V02B discharges.
It needs further exist for illustrating, in the present invention, solid discharge system includes solid exhaust pipe P04, solid exhaust pipe
P03, solid exhaust pipe P02 and solid exhaust pipe P01, solid exhaust pipe P04 are connected to the bottom surge tank V01, solid exhaust pipe
P03, which is connected to, adjusts the bottom tank V03, and solid exhaust pipe P02 adsorbs/be desorbed the bottom tank V02B, and solid exhaust pipe P01 is connected to suction
Attached/desorption bottom tank V02A.
Embodiment 2
A kind of process of the uniform thermal desorption recycling and administration VOCs gas of small air quantity, includes the following steps (the present embodiment
In, equipment, component, device and instrument in processing step are equipment, component, device and instrument in 1 system of embodiment):
Step 1:VOCs exhaust gas enters the surge tank V01 with coalescence function and automatic back blow filter F L01 is located in advance
Reason, is fed to absorption/desorption tank V02A by pretreated VOCs exhaust gas and is adsorbed, the gas up to standard after adsorption cleaning
Enter chimney chimney Q05 discharge through shut-off valve F04；Another adsorbs/is desorbed tank V02B and is now in desorption stage or spare
Stage guarantees that purification system can be continuously run, does not influence workshop and normally produce；
Step 2: when absorption/desorption tank V02A absorption reaches breakthrough point, closing shut-off valve F02, shut-off valve F14, shut-off valve
F12 and shut-off valve F07, opening shut-off valve F13, shut-off valve F06, shut-off valve F11 and shut-off valve F08 makes absorption/desorption tank V02B
Into absorption phase, absorption/desorption tank V02A enters desorption stage；
Step 3: absorption/desorption tank V02A enters desorption stage:
A: nitrogen supply valve (pneumatic operated valve QD01) absorption/desorption tank V02A nitrogen displacement: is opened toward absorption/desorption tank V02A
The nitrogen for being filled with 99% or more carries out nitrogen displacement.The gas that nitrogen cements out through triple valve FS01 be sent into air-introduced machine BL01 into
Enter and enters chimney chimney Q05 discharge through shut-off valve F04 after absorption/desorption tank V02B adsorption cleaning.
B: it absorption/desorption tank V02A desorption: when online oxygen content monitor detects system oxygen concentration less than 0.3%, adjusts
Triple valve FS01 is saved, heating device D01 heated nitrogen is opened, is sent into absorption/desorption tank V02A after nitrogen heating and is desorbed, taken off
Attached gas is sent into adjustment heat value system after heat-exchange system tentatively cools down, and carries out adjustment heat value, ensures desorption system in desorption process
In barotropic state (system has pressure sensor, pressure change in real-time monitoring system) when system pressure is higher than 300kpa
When, system automatic adjustment nitrogen supply valve (pneumatic operated valve QD01) controls nitrogen flow, and online oxygen content testing instrument is real-time
The variation of oxygen content in monitoring system, and handled by DCS system (prior art) control；
C: absorption/desorption tank V02A nitrogen is replaced again: the sending when line oxygen content monitor detects oxygen content > 1.5%
Alarm, heating device D01 stop heating, and regulating three-way valve FS01 replaces again into nitrogen, when oxygen content≤1.2%, adjust
Triple valve FS01, absorption/desorption tank V02A re-start desorption.
Step 4: absorption/desorption tank V02A desorption is completed: after reaching desorption time, closing nitrogen, heating device D01, heat
It is worth regulating system, system Temperature fall makes active carbon layer of charcoal temperature be reduced to adsorbent operating temperature in order to next
The absorption of circulation uses.
Step 5: step 1- step 3 automatic cycle carries out, and absorption/desorption tank V02A and absorption/desorption tank V02B alternately inhale
Attached, desorption, cooling.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of process of the uniform thermal desorption recycling and administration VOCs gas of small air quantity, comprising the following steps:
Step 1:VOCs exhaust gas enters the surge tank V01 with coalescence function and automatic back blow filter F L01 is pre-processed, warp
It crosses pretreated VOCs exhaust gas and is fed to absorption/desorption tank V02A and adsorbed, the gas up to standard after adsorption cleaning is through cutting
Only valve F04 enters chimney chimney Q05 discharge；Another adsorbs/is desorbed tank V02B and is now in desorption stage or stand-by phase,
Guarantee that purification system can be continuously run, does not influence workshop and normally produce；
Step 2: when absorption/desorption tank V02A absorption reaches breakthrough point, close shut-off valve F02, shut-off valve F14, shut-off valve F12 and
Shut-off valve F07, opening shut-off valve F13, shut-off valve F06, shut-off valve F11 and shut-off valve F08 makes absorption/desorption tank V02B enter suction
Attached stage, absorption/desorption tank V02A enter desorption stage；
Step 3: absorption/desorption tank V02A enters desorption stage:
A: absorption/desorption tank V02A nitrogen displacement: the nitrogen that nitrogen supply valve is filled with 99% or more toward absorption/desorption tank V02A is opened
Gas carries out nitrogen displacement；
B: when online oxygen content monitor detects system oxygen concentration less than 0.3%, three absorption/desorption tank V02A desorption: are adjusted
Port valve FS01 opens heating device D01 heated nitrogen, is sent into absorption/desorption tank V02A after nitrogen heating and is desorbed, gas is desorbed
It is sent into adjustment heat value system after cooling down and carries out adjustment heat value, ensures that desorption system is in barotropic state in desorption process, when being
When pressure of uniting is higher than 300kpa, system automatic adjustment nitrogen supply valve controls nitrogen flow, online oxygen content testing instrument
The variation of oxygen content in real-time monitoring system, and handled by DCS system control；
C: absorption/desorption tank V02A nitrogen is replaced again: police is issued when line oxygen content monitor detects oxygen content > 1.5%
Report, heating device D01 stop heating, and regulating three-way valve FS01 replaces again into nitrogen, when oxygen content≤1.2%, adjust three
Port valve FS01, absorption/desorption tank V02A re-start desorption；
Step 4: absorption/desorption tank V02A desorption is completed: after reaching desorption time, closing nitrogen, heating device D01 and calorific value tune
Section system makes active carbon layer of charcoal temperature that adsorbent operating temperature is reduced to use in order to the absorption of subsequent cycle；
Step 5: step 1- step 4 automatic cycle carries out, and absorption/desorption tank V02A and absorption/desorption tank V02B alternating sorbent take off
It is attached, cooling.
2. the process of the uniform thermal desorption recycling and administration VOCs gas of small air quantity according to claim 1, feature exist
In: the process of the small uniform thermal desorption recycling and administration VOCs gas of air quantity further includes heat-exchange system, the desorption gas
It exchanges heat before into adjustment heat value system through the heat-exchange system and the nitrogen before heating device D01 heating.
3. the process of the uniform thermal desorption recycling and administration VOCs gas of small air quantity according to claim 1, feature exist
In: the gas that the nitrogen cements out is sent into air-introduced machine BL01 through triple valve FS01 and enters absorption/desorption tank V02B absorption only
Enter chimney chimney Q05 discharge through shut-off valve F04 after change.
4. a kind of system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity, it is characterised in that: the small air quantity uniform heat
Desorption recycling and administration VOCs gas system include VOCs gas inlet system, adsorption system, VOCs gas blow-off system up to standard,
Liquid-discharging system, solid discharge system, desorption gas handling system, desorption system, desorption gas intermediate system, desorption gas discharge
System and adjustment heat value system, adsorption system respectively with VOCs gas inlet system, liquid-discharging system, solid discharge system and
VOCs gas blow-off system connection up to standard, desorption system are connect with desorption gas handling system and adjustment heat value system respectively, calorific value tune
Section system is also connect with desorption gas exhaust system and liquid-discharging system respectively, and desorption gas intermediate system is with desorption respectively
System is connected with adjustment heat value system.
5. the system of the uniform thermal desorption recycling and administration VOCs gas of small air quantity according to claim 4, it is characterised in that: institute
State VOCs gas inlet system include VOCs exhaust inlet pipe G03 and VOCs exhaust gas source Q02, the VOCs exhaust inlet pipe G03 with
The Q02 connection of VOCs exhaust gas source, adsorption system include absorption/desorption tank V02A and absorption/desorption tank V02B, VOCs exhaust inlet pipe
G03 is connect with absorption/desorption tank V02A and absorption/desorption tank V02B respectively, and VOCs gas blow-off system up to standard includes up to standard
VOCs gas discharge pipe G08 and chimney Q05, VOCs gas discharge pipe G08 up to standard are connect with chimney Q05, VOCs gas row up to standard
Pipe G08 is put also to connect with absorption/desorption tank V02A and absorption/desorption tank V02B respectively.
6. according to the system of any uniform thermal desorption recycling and administration VOCs gas of small air quantity of claim 4-5, feature
Be: the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity further includes pretreatment system, and pretreatment system connects
It connects on VOCs exhaust inlet pipe G03, pretreatment system includes surge tank V01, filter F L01 and air-introduced machine BL01, filter
FL01 is arranged between surge tank V01 and air-introduced machine BL01.
7. according to the system of any uniform thermal desorption recycling and administration VOCs gas of small air quantity of claim 4-6, feature
Be: the desorption gas handling system includes inert gas inleting pipe G01, heating device D01 and inert gas source Q04, indifferent gas
Body air inlet pipe G01 is connect with inert gas source Q04, and heating device D01 is connected on inert gas inleting pipe G01, desorption system
Including the absorption/desorption tank V02A and the absorption/desorption tank V02B, inert gas inleting pipe G01 also respectively with absorption/de-
Attached tank V02A is connected with absorption/desorption tank V02B, and desorption gas exhaust system includes desorption gas delivery pipe G09 and gas pipe network
Q06, desorption gas one end delivery pipe G09 are connect with adjustment heat value system, other end connection gas pipe network Q06, in desorption gas
Between system include desorption gas intermediate tube G10, desorption gas intermediate tube G10 respectively with absorption/desorption tank V02A, absorption/desorption
Tank V02B is connected with adjustment heat value system, and adjustment heat value system includes adjusting tank V03.
8. according to the system of any uniform thermal desorption recycling and administration VOCs gas of small air quantity of claim 4-7, feature
Be: the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity further includes desorption gas adsorption system again, desorption
Adsorption system includes that desorption gas adsorbs return pipe G05 and triple valve FS01 again to gas again, and desorption gas adsorbs the one end return pipe G05 again
It is connected with desorption gas intermediate tube G10, the other end is connect with VOCs exhaust inlet pipe G03.
9. according to the system of any uniform thermal desorption recycling and administration VOCs gas of small air quantity of claim 4-8, feature
Be: the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity further includes steam vapour system, low-pressure steam system
System prevents thermal loss, steam vapour system includes low pressure steam pipe G02 and low-pressure steam source Q03, low pressure for assisting heating
Steam pipe G02 is connect with low-pressure steam source Q03, low pressure steam pipe G02 also respectively with absorption/desorption tank V02A, absorption/desorption tank
V02B connection.
10. according to the system of any uniform thermal desorption recycling and administration VOCs gas of small air quantity of claim 4-9, feature
Be: the system of the small uniform thermal desorption recycling and administration VOCs gas of air quantity further includes heat-exchange system, and heat-exchange system is heat exchange
Device E01, heat-exchange system are connect with desorption gas intermediate tube G10 and inert gas inleting pipe G01 respectively.
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