CN103908848A - Gas dedusting and purifying method and system - Google Patents
Gas dedusting and purifying method and system Download PDFInfo
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- CN103908848A CN103908848A CN201410126278.3A CN201410126278A CN103908848A CN 103908848 A CN103908848 A CN 103908848A CN 201410126278 A CN201410126278 A CN 201410126278A CN 103908848 A CN103908848 A CN 103908848A
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- gas
- injection device
- temperature
- medium injection
- udst separation
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 153
- 239000002826 coolant Substances 0.000 claims abstract description 63
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 213
- 238000002347 injection Methods 0.000 claims description 115
- 239000007924 injection Substances 0.000 claims description 115
- 238000004140 cleaning Methods 0.000 claims description 21
- 239000003507 refrigerant Substances 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 235000011089 carbon dioxide Nutrition 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000000428 dust Substances 0.000 description 7
- 239000006256 anode slurry Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 description 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 3
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 3
- 229910000410 antimony oxide Inorganic materials 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a gas dedusting and purifying method and system, and can realize temperature control on gas to be dedusted and purified. The method comprises the steps of delivering the gas to be dedusted and purified into a gas dedusting and purifying device to realize gas-solid separation by a gas inlet pipeline, outputting the dedusted and purified gas from the gas dedusting and purifying device by an exhaust pipeline, controlling the temperature of the gas to be dedusted and purified in the gas inlet pipeline, when the temperature of the gas to be dedusted and purified exceeds the set temperature, injecting a cooling medium into the gas to be dedusted and purified, and when the temperature of the gas to be dedusted and purified is lower than the set temperature, injecting a heating-up medium into the gas to be dedusted and purified, and therefore, the to-be-dedusted-and-purified gas with the temperature kept be within a set temperature range enters the gas dedusting and purifying device. According to the method, a mode of injecting the cooling medium/the heating-up medium to adjust the temperature of the gas to be dedusted and purified is adopted, the control response speed is high, a complex heat exchange device is not required, and the temperature of the gas to be dedusted and purified can be adjusted within a large range.
Description
Technical field
The present invention relates to dedusting purification method and dedusting cleaning system.
Background technology
Dry method dedusting process for purifying comprises that will treat through admission line that udst separation gas is sent in dedusting purifier realizes gas solid separation, then exports the operation of udst separation gas through discharge duct from dedusting purifier.The temperature and pressure scope that tends to treat udst separation gas in aforesaid operations has certain requirement.Such as, in high-temperature gas dry method dust process for purifying, when until udst separation gas temperature superelevation, easily dedusting purifier is brought to damage, simultaneously also be unfavorable for high-temperature pipe Component selection and cost control, and when in the time that udst separation gas temperature is too low, treat that part composition in udst separation gas usually can be condensed into again liquid and cause pipeline to pollute and part obstruction, therefore the temperature that need treat udst separation gas when, high-temperature gas dry method dust purifies compares strict restriction.Again such as, in flammable explosive gas dry method dust process for purifying, when in the time that udst separation gas pressure is too high, easily there is gas leak in system pipeline element, and when in the time that udst separation gas pressure is too low, easily occur again in outside air to leak, thereby the potential safety hazard of causing.At present, when in the time that the temperature of udst separation gas or pressure can not meet technological requirement, conventionally take not allow this part treat that udst separation gas enters the passive processing mode of cleaning system, thereby both increased the subsequent treatment difficulty to this part gas, and also reduced dedusting simultaneously and purified operating efficiency.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of dedusting purification method and the system that can treat udst separation gas and carry out temperature control.
Second technical problem to be solved by this invention is to provide a kind of dedusting cleaning system that can treat udst separation gas and carry out pressure control.
For solving above-mentioned first technical problem, dedusting purification method of the present invention comprises that will treat through admission line that udst separation gas is sent in dedusting purifier realizes gas solid separation, then export the operation of udst separation gas through discharge duct from dedusting purifier, in aforesaid operations process, the udst separation gas for the treatment of in admission line is carried out to temperature control simultaneously, when treat injection cooling medium in udst separation gas to this in the time that the temperature of udst separation gas exceedes design temperature, when treat to inject intensification medium in udst separation gas during lower than design temperature to this until the temperature of udst separation gas, thereby will treat that udst separation gas remains on enters dedusting purifier within the scope of design temperature.The mode of the method employing injection cooling medium/intensification medium is treated udst separation gas and is carried out temperature adjustment, control response speed soon, the heat-exchanger rig of Structure of need complexity not, and the temperature that can treat udst separation gas regulates, expand the scope of application of dedusting process for purifying on a large scale.
As a kind of preferred embodiment to above-mentioned gas dust-removing and purifying method, the first Tube Temperature Sensor and second pipe temperature sensor are set respectively before and after on described admission line, on admission line, between the first Tube Temperature Sensor and second pipe temperature sensor, be connected cooling medium injection device and intensification medium injection device, establishing the first Tube Temperature Sensor measurement temperature is T
1, second pipe temperature sensor measurement temperature is T
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
maxif detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
2>=T
minrear intensification medium injection device cuts out, if detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
2≤ T
maxrear heating and cooling medium injection device cuts out.
As the another kind of preferred embodiment to above-mentioned gas dust-removing and purifying method, the first Tube Temperature Sensor and second pipe temperature sensor are set respectively before and after on described admission line, on admission line, between the first Tube Temperature Sensor and second pipe temperature sensor, be connected cooling medium injection device and intensification medium injection device, on admission line, between second pipe temperature sensor and dedusting purifier, be connected the input of gas circulation pipeline, on admission line at the first Tube Temperature Sensor and the output for the treatment of to be connected between udst separation source of the gas gas circulation pipeline, gas circulation pipeline is provided with power set and valve, if it is T that the first Tube Temperature Sensor is measured temperature
1, second pipe temperature sensor measurement temperature is T
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
maxif detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
min≤ T
2≤ T
maxrear intensification medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier and will treat the loopback of udst separation gas by gas circulation pipeline, if detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
min≤ T
2≤ T
maxrear heating and cooling medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier and will treat the loopback of udst separation gas by gas circulation pipeline.
In above-mentioned gas dust-removing and purifying method, described cooling medium can adopt at least one in inertia refrigerant or the cooled gas of udst separation of process; In the time that cooling medium adopts inertia refrigerant, described inertia refrigerant can be selected from one or more in low temperature inert gas, liquid nitrogen, dry ice.Described intensification medium can adopt combustion furnace furnace gas, and this combustion furnace adopts carbon-based fuel burning to generate the high-temperature furnace gas as leading take carbon dioxide and water.
The dedusting cleaning system providing for solving above-mentioned first technical problem, comprise and connect the dedusting purifier of admission line and discharge duct and treat that for driving udst separation gas realizes gas solid separation in admission line is sent to dedusting purifier, then export the power set of udst separation gas through discharge duct from dedusting purifier, this system also comprises for the temperature controller that udst separation gas carries out the temperature measuring equipment of thermometric and is connected with temperature measuring equipment for the treatment of in admission line, this temperature controller connects respectively the keying executing agency on cooling medium injection device and intensification medium injection device, treat injection cooling medium in udst separation gas to this when start cooling medium injection device in the time that the temperature of udst separation gas exceedes design temperature, treat to inject in udst separation gas intensification medium to this when start intensification medium injection device during lower than design temperature until the temperature of udst separation gas, thereby will treat that udst separation gas remains on enters dedusting purifier within the scope of design temperature.
As a kind of preferred embodiment to above-mentioned gas dust separation system, the first Tube Temperature Sensor and second pipe temperature sensor are set respectively before and after on described admission line, on admission line, between the first Tube Temperature Sensor and second pipe temperature sensor, be connected cooling medium injection device and intensification medium injection device, establishing the first Tube Temperature Sensor measurement temperature is T
1, second pipe temperature sensor measurement temperature is T
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
maxif detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
2>=T
minrear intensification medium injection device cuts out, if detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
2≤ T
maxrear heating and cooling medium injection device cuts out.
As the another kind of preferred embodiment to above-mentioned gas dust separation system, the first Tube Temperature Sensor and second pipe temperature sensor are set respectively before and after on described admission line, on admission line, between the first Tube Temperature Sensor and second pipe temperature sensor, be connected cooling medium injection device and intensification medium injection device, on admission line, between second pipe temperature sensor and dedusting purifier, be connected the input of gas circulation pipeline, on admission line at the first Tube Temperature Sensor and the output for the treatment of to be connected between udst separation source of the gas gas circulation pipeline, gas circulation pipeline is provided with power set and valve, if it is T that the first Tube Temperature Sensor is measured temperature
1, second pipe temperature sensor measurement temperature is T
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
maxif detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
min≤ T
2≤ T
maxrear intensification medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier and will treat the loopback of udst separation gas by gas circulation pipeline, if detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
min≤ T
2≤ T
maxrear heating and cooling medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier and will treat the loopback of udst separation gas by gas circulation pipeline.
As a kind of specific embodiments of the medium injection device of lowering the temperature in above-mentioned gas dust separation system, described power set are arranged on discharge duct, on discharge duct, between dedusting purifier and power set, be provided with gas cooler, between the exhaust end of power set and described admission line, be connected with as cooling medium injection device appendix, the control valve being connected with temperature controller is installed on this appendix.
As a kind of specific embodiments of the medium injection device that heats up in above-mentioned gas dust separation system, described admission line connects combustion furnace furnace gas efferent duct, the inlet end of this combustion furnace furnace gas efferent duct is connected with combustion furnace, exhaust end is connected with admission line, on combustion furnace furnace gas efferent duct, the control valve being connected with temperature controller is installed.
For solving above-mentioned second technical problem, dedusting cleaning system of the present invention comprises and connects the dedusting purifier of admission line and discharge duct and treat that for driving udst separation gas realizes gas solid separation in admission line is sent to dedusting purifier, then export the power set of udst separation gas through discharge duct from dedusting purifier, described power set are arranged on discharge duct and adopt frequency conversion fan; This system also comprises for the voltage regulator controllers that udst separation gas carries out the pressure sensor of pressure measurement and is connected with pressure sensor for the treatment of in admission line, this voltage regulator controllers connects the frequency conversion executing agency of frequency conversion fan, and the gaging pressure of establishing pressure sensor is P
1, the minimum allowable pressure for the treatment of udst separation gas is P
min, the maximum allowable pressure for the treatment of udst separation gas is P
max, work as P
1> P
maxthe operating frequency of Shi Zeng great frequency conversion fan, works as P
1< P
mintime reduce the operating frequency of frequency conversion fan.Visible, this dedusting cleaning system can be controlled by the pressure of the adjusting of frequency conversion fan operating frequency being treated to udst separation gas, makes it be tending towards P
minwith P
maxbetween, realize the object for the treatment of udst separation gas and carry out pressure control.
To partly provide in the following description below in conjunction with the drawings and specific embodiments aspect that the present invention is described further, the present invention is additional and advantage, part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of dedusting cleaning system in the specific embodiment of the invention.
The specific embodiment
Dedusting cleaning system as shown in Figure 1, comprise and connect the dedusting purifier 2 of admission line A1 and discharge duct A2 and treat that for driving udst separation gas G1 is sent to the interior gas solid separation that realizes of dedusting purifier 2 through admission line A1, then export the power set 3 of udst separation gas G2 through discharge duct A2 from dedusting purifier 2, it is upper that power set 3 are arranged on discharge duct A2, and the input of admission line A1 connects treats udst separation source of the gas 1, this dedusting cleaning system also comprises for the temperature controller that udst separation gas G1 carries out the temperature measuring equipment of thermometric and is connected with temperature measuring equipment for the treatment of in admission line A1, this temperature controller connects respectively the keying executing agency on cooling medium injection device and intensification medium injection device, treat injection cooling medium S1 in udst separation gas G1 to this when start cooling medium injection device in the time that the temperature of udst separation gas G1 exceedes design temperature, treat to inject in udst separation gas G1 intensification medium S2 to this when start intensification medium injection device during lower than design temperature until the temperature of udst separation gas G1, thereby will treat that udst separation gas G1 remains on enters dedusting purifier 2 within the scope of design temperature.
In above-mentioned dedusting cleaning system, discharge duct A2 is upper is provided with gas cooler 6 between dedusting purifier 2 and power set 3, between the exhaust end of power set 3 and described admission line A1, be connected with the appendix 8 as cooling medium injection device, the control valve K5 being connected with temperature controller is installed on this appendix 8.In the time of opening controlling valve K5, what the exhaust end of power set 3 was discharged will be injected into and treat in udst separation gas G1 as cooling medium S1 through the cooled udst separation of gas cooler 6 gas G2, lower the temperature thereby treat udst separation gas G1.Cooling medium S1 can use completely through the cooled gas of udst separation G2, but, if cooling medium S1 uses completely through the cooled gas of udst separation G2, not only can reduce interior output quantity from dedusting cleaning system of udst separation gas G2 unit interval, and, if treat the cooling extent of udst separation gas G1 when larger, need the gas of the udst separation G2 that temperature is lower, will propose higher requirement to udst separation gas G2 cooling down like this, thereby increase its cooling difficulty.
Therefore,, as the effective of above-mentioned cooling medium injection device supplemented, cooling medium injection device also comprises an inertia refrigerant injection device.As shown in Figure 1, this inertia refrigerant injection device comprises inertia refrigerant memory device 5, the output of this inertia refrigerant memory device 5 is connected with inertia refrigerant output channel, the output of inertia refrigerant output channel is connected on described appendix 8, on inertia refrigerant output channel, the control valve K3 being connected with temperature controller is installed simultaneously.Certainly, it is upper that the output of inertia refrigerant output channel also can directly be connected to admission line A1, but be preferably connected on described appendix 8 according to mode above.Like this, in the time that the control valve K3 on control valve K5 and the inertia refrigerant output channel stated on appendix 8 all opens, can be through the cooled gas of udst separation G2 as main cooling medium S1, inertia refrigerant is as auxiliary cooling medium S1, these two kinds cooling medium S1 are mixed fully at the latter end of appendix 8, thereby utilize inertia refrigerant first by the further cooling down of udst separation gas G2, promote cooling efficiency.Wherein, the suggestion of inertia refrigerant adopts one or more in low temperature inert gas, liquid nitrogen, dry ice.Certainly, those skilled in the art also can select other suitable inertia refrigerants according to concrete technology.
As Fig. 1, in above-mentioned dedusting cleaning system, admission line A1 is also connected with combustion furnace furnace gas efferent duct 9, the inlet end of this combustion furnace furnace gas efferent duct 9 is connected with combustion furnace 4, exhaust end is connected with admission line A1, and the control valve K2 being connected with temperature controller is installed on combustion furnace furnace gas efferent duct 9.This combustion furnace 4 preferably adopt that carbon-based fuel (for example natural gas, clean gas, liquefied petroleum gas) burning generates using carbon dioxide and water as main high-temperature furnace gas is as intensification medium S2, can not produce like this pernicious gas, nonpollution environment.
Embodiment 1
Dedusting cleaning system in the above-mentioned specific embodiment is specially the system for Electric Cooker phosphorus furnace gas is carried out to udst separation.Therefore, treat that udst separation source of the gas 1 is phosphorus electric furnace processed accordingly.The yellow phosphorus furnace gas that phosphorus electric furnace processed produces passes through after this dedusting cleaning system udst separation, then obtains yellow phosphorus product through condensation washing, refining separation.In this dedusting process for purifying, requirement treats that udst separation gas G1(is yellow phosphorus furnace gas) temperature remain 187.5-350 ℃, treat that udst separation gas G1 will cause phosphorus steam-condensation in furnace gas and occluding device lower than 187.5 ℃, until udst separation gas G1 during higher than 350 ℃ process operation economy undesirable.The dedusting purifier 2 of this embodiment specifically adopts high-temperature gas filter, and the filter element of high temperature resistant sintered porous material filter core is installed in high-temperature gas filter.
As Fig. 1, in order to treat that udst separation gas G1 remains on 187.5-350 ℃ and enters dedusting purifier 2, before and after described admission line A1 is upper, the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb are set respectively, admission line A1 is upper is connected above-mentioned cooling medium injection device and intensification medium injection device between the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb, and establishing the first Tube Temperature Sensor Ta measurement temperature is T
1, it is T that second pipe temperature sensor Tb measures temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min(187.5 ℃), the maximum safety temperature for the treatment of udst separation gas is T
max(350 ℃), if detect T
1the medium injection device that heats up when 187.5 ℃ of < is opened and cooling medium injection device keeps cutting out (control valve K2 opens, and control valve K3, K5 keep closing), when detecting T
2the medium injection device that heats up after>=187.5 ℃ cuts out (control valve K2 closes), if detect T
1the medium injection device of lowering the temperature when 350 ℃ of > is opened and intensification medium injection device keeps cutting out (control valve K3, K5 open, and control valve K2 keeps closing), when detecting T
2after≤350 ℃, heating and cooling medium injection device cuts out (control valve K3, K5 close).
In the dedusting process for purifying of embodiment 1, owing to treating that the minimum allowable temperature of udst separation gas is T
min(187.5 ℃) with treat that the maximum safety temperature of udst separation gas is T
maxwider range between (350 ℃), therefore, the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb are set respectively before and after above on described admission line A1, upper cooling medium injection device and the intensification medium injection device of being connected between the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb of admission line A1, establishing the first Tube Temperature Sensor Ta measurement temperature is T
1, it is T that second pipe temperature sensor Tb measures temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
maxif detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
2>=T
minrear intensification medium injection device cuts out, if detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
2≤ T
maxthe control method that rear heating and cooling medium injection device cuts out can meet and will treat that udst separation gas G1 remains on the technical requirement that enters dedusting purifier 2 in 187.5-350 ℃.
Embodiment 2
Dedusting cleaning system in the above-mentioned specific embodiment is specially the system for lead anode slurry melting furnace gas is carried out to udst separation.Treat that udst separation source of the gas 1 is reverberatory furnace accordingly.(lead anode slurry is the byproduct producing in electrolytic lead refining process to lead anode slurry melting furnace gas, at present mainly reclaim valuables wherein by pyrogenic attack technique, when processing, need to carry out melting to lead anode slurry, thereby produce furnace gas) in main component be arsenic trioxide, antimony oxide, because the temperature of sublimating of antimony oxide is higher than arsenic trioxide, obtain high purity sb2o3 in order to reclaim, the dedusting process for purifying of embodiment 2 requires to treat that udst separation gas G1(is lead anode slurry melting furnace gas) remain on 400-480 ℃ compared with close limit, be intended to be recovered to high purity sb2o3 particle by dedusting purifier 2, arsenic trioxide keeps gaseous state to discharge from dedusting purifier 2.The dedusting purifier 2 of this embodiment adopts high-temperature gas filter equally, and the filter element of high temperature resistant sintered porous material filter core is installed in high-temperature gas filter.Because reverberatory furnace temperature fluctuation range is larger, simultaneously the dedusting process for purifying of embodiment 2 require again by treat udst separation gas G1 remain on 400-480 ℃ compared with close limit, the temperature control that therefore embodiment 2 treats udst separation gas G1 requires higher.
As Fig. 1, in order to treat that udst separation gas G1 remains on 400-480 ℃ and enters dedusting purifier 2, before and after described admission line A1 is upper, the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb are set respectively, upper cooling medium injection device and the intensification medium injection device of being connected between the first Tube Temperature Sensor Ta and second pipe temperature sensor Tb of admission line A1, the upper input that is connected gas circulation pipeline A3 between second pipe temperature sensor Tb and dedusting purifier 2 of admission line A1, admission line A1 is upper at the first Tube Temperature Sensor Ta and the output for the treatment of to be connected between udst separation source of the gas 1 gas circulation pipeline A3, gas circulation pipeline A3 is provided with power set and valve, if it is T that the first Tube Temperature Sensor Ta measures temperature
1, it is T that second pipe temperature sensor Tb measures temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min(400 ℃), the maximum safety temperature for the treatment of udst separation gas is T
max(480 ℃), if detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out (control valve K2 opens, and control valve K3, K5 keep closing), when detecting T
min≤ T
2≤ T
maxrear intensification medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel (closing the valve K1 in Fig. 1) of dedusting purifier 2 and will treat udst separation gas G1 loopback (open valve K4, power set 7 are starting state) by gas circulation pipeline A3, if detect T
1> T
maxshi Jiangwen medium injection device is opened and intensification medium injection device keeps cutting out (control valve K3, K5 open, control valve K2 keep cut out), when detecting T
min≤ T
2≤ T
maxrear heating and cooling medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel (closing the valve K1 in Fig. 1) of dedusting purifier 2 and will treat udst separation gas G1 loopback (open valve K4, power set 7 are starting state) by gas circulation pipeline A3.Visible, the temperature control method temperature control of embodiment 2 is more accurate, is suitable for treating the stricter occasion of udst separation gas G1 temperature requirement.
Embodiment 3
Embodiment 3 is improvement of carrying out on embodiment 2 bases.Because reverberatory furnace fluctuation of operating conditions is larger, and the temperature control method more complicated of embodiment 2, no matter treat the G1 loopback of udst separation gas or inject intensification medium/cooling medium, all can cause the fluctuation for the treatment of udst separation gas G1 pressure in admission line A1.Therefore, control in order to treat udst separation gas G1 pressure, power set 3 have specifically adopted frequency conversion fan, dedusting cleaning system has also been set up for the voltage regulator controllers that udst separation gas G1 carries out the pressure sensor Pa of pressure measurement and is connected with pressure sensor Pa for the treatment of in admission line A1, this voltage regulator controllers connects the frequency conversion executing agency of frequency conversion fan, and the gaging pressure of establishing pressure sensor Pa is P
1, the minimum allowable pressure for the treatment of udst separation gas is P
min, the maximum allowable pressure for the treatment of udst separation gas is P
max, work as P
1> P
maxthe operating frequency of Shi Zeng great frequency conversion fan, works as P
1< P
mintime reduce the operating frequency of frequency conversion fan.So just can control by the pressure of the adjusting of frequency conversion fan operating frequency being treated to udst separation gas, make it be tending towards P
minwith P
maxbetween, realize the object for the treatment of udst separation gas and carry out pressure control.Embodiment 3 treats that by treat udst separation gas temperature control technique means and its of embodiment 2 udst separation gas pressure control technology combines, make up to a certain extent the air pressure fluctuation problem causing while injecting intensification medium/cooling medium, realized the combination of temperature control technique of the present invention and pressure control technology.
Claims (10)
1. dedusting purification method, comprise that will treat through admission line (A1) that udst separation gas (G1) is sent in dedusting purifier (2) realizes gas solid separation, then export the operation of udst separation gas (G2) through discharge duct (A2) from dedusting purifier (2), it is characterized in that: in aforesaid operations process, the udst separation gas (G1) for the treatment of in admission line (A1) is carried out to temperature control simultaneously, when treat injection cooling medium (S1) in udst separation gas (G1) to this in the time that the temperature of udst separation gas (Q1) exceedes design temperature, when treat to inject intensification medium (S2) in udst separation gas (G1) during lower than design temperature to this until the temperature of udst separation gas (G1), thereby will treat that udst separation gas (G1) remains on enters dedusting purifier (2) within the scope of design temperature.
2. dedusting purification method as claimed in claim 1, it is characterized in that: before and after described admission line (A1) is upper, the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) are set respectively, on admission line (A1), be positioned between the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) and be connected cooling medium injection device and intensification medium injection device, establishing the first Tube Temperature Sensor (Ta) measurement temperature is T
1, it is T that second pipe temperature sensor (Tb) is measured temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
max,
If detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
2>=T
minrear intensification medium injection device cuts out;
If detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
2≤ T
maxrear heating and cooling medium injection device cuts out.
3. dedusting purification method as claimed in claim 1, it is characterized in that: before and after described admission line (A1) is upper, the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) are set respectively, on admission line (A1), be positioned at and between the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb), be connected cooling medium injection device and intensification medium injection device, on admission line (A1), be positioned at the input that is connected gas circulation pipeline (A3) between second pipe temperature sensor (Tb) and dedusting purifier (2), on admission line (A1), be positioned at the first Tube Temperature Sensor (Ta) and the output for the treatment of to be connected between udst separation source of the gas (1) gas circulation pipeline (A3), gas circulation pipeline (A3) is provided with power set and valve, if it is T that the first Tube Temperature Sensor (Ta) is measured temperature
1, it is T that second pipe temperature sensor (Tb) is measured temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
max,
If detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
min≤ T
2≤ T
maxrear intensification medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier (2) and will treat udst separation gas (G1) loopback by gas circulation pipeline (A3);
If detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
min≤ T
2≤ T
maxrear heating and cooling medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier (2) and will treat udst separation gas (G1) loopback by gas circulation pipeline (A3).
4. the dedusting purification method as described in claim 1,2 or 3, is characterized in that: described cooling medium adopts at least one in inertia refrigerant or the cooled gas of udst separation of process (G2); Described inertia refrigerant is selected from one or more in low temperature inert gas, liquid nitrogen, dry ice.
5. the dedusting purification method as described in claim 1,2 or 3, is characterized in that: described intensification medium adopts combustion furnace furnace gas, and this combustion furnace adopts carbon-based fuel burning to generate take carbon dioxide and water as main high-temperature furnace gas.
6. dedusting cleaning system, comprise and connect admission line A1) and the dedusting purifier (2) of discharge duct (A2) and treat that for driving udst separation gas (G1) realizes gas solid separation in admission line (A1) is sent to dedusting purifier (2), then export the power set (3) of udst separation gas (G2) through discharge duct (A2) from dedusting purifier (2), it is characterized in that: this system also comprises for the temperature controller that udst separation gas (G1) carries out the temperature measuring equipment of thermometric and is connected with temperature measuring equipment for the treatment of in admission line (A1), this temperature controller connects respectively the keying executing agency on cooling medium injection device and intensification medium injection device, treat injection cooling medium in udst separation gas (G1) to this when start cooling medium injection device in the time that the temperature of udst separation gas (G1) exceedes design temperature, treat to inject in udst separation gas (G1) intensification medium to this when start intensification medium injection device during lower than design temperature until the temperature of udst separation gas (G1), thereby will treat that udst separation gas (G1) remains on enters dedusting purifier (2) within the scope of design temperature.
7. dedusting cleaning system as claimed in claim 6, it is characterized in that: before and after described admission line (A1) is upper, the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) are set respectively, on admission line (A1), be positioned between the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) and be connected cooling medium injection device and intensification medium injection device, establishing the first Tube Temperature Sensor (Ta) measurement temperature is T
1, it is T that second pipe temperature sensor (Tb) is measured temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
max,
If detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
2>=T
minrear intensification medium injection device cuts out;
If detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
2≤ T
maxrear heating and cooling medium injection device cuts out.
8. dedusting cleaning system as claimed in claim 6, it is characterized in that: before and after described admission line (A1) is upper, the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb) are set respectively, on admission line (A1), be positioned at and between the first Tube Temperature Sensor (Ta) and second pipe temperature sensor (Tb), be connected cooling medium injection device and intensification medium injection device, on admission line (A1), be positioned at the input that is connected gas circulation pipeline (A3) between second pipe temperature sensor (Tb) and dedusting purifier (2), on admission line (A1), be positioned at the first Tube Temperature Sensor (Ta) and the output for the treatment of to be connected between udst separation source of the gas (1) gas circulation pipeline (A3), gas circulation pipeline (A3) is provided with power set and valve, if it is T that the first Tube Temperature Sensor (Ta) is measured temperature
1, it is T that second pipe temperature sensor (Tb) is measured temperature
2, the minimum allowable temperature for the treatment of udst separation gas is T
min, the maximum safety temperature for the treatment of udst separation gas is T
max,
If detect T
1< T
minshi Shengwen medium injection device is opened and cooling medium injection device keeps cutting out, when detecting T
min≤ T
2≤ T
maxrear intensification medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier (2) and will treat udst separation gas (G1) loopback by gas circulation pipeline (A3);
If detect T
1> T
maxshi Jiangwen medium injection device open and intensification medium injection device keep close, when detecting T
min≤ T
2≤ T
maxrear heating and cooling medium injection device cuts out, and when detecting T
2< T
minor T
2> T
maxin time, cuts off to the air supply channel of dedusting purifier (2) and will treat udst separation gas (G1) loopback by gas circulation pipeline (A3).
9. the dedusting cleaning system as described in claim 6,7 or 8, it is characterized in that: described power set (3) are arranged on discharge duct (A2), on discharge duct (A2), be positioned between dedusting purifier (2) and power set (3) and be provided with gas cooler (6), between the exhaust end of power set (3) and described admission line (A1), be connected with the appendix (8) as cooling medium injection device, the control valve (K5) being connected with temperature controller is installed on this appendix (8).
10. the dedusting cleaning system as described in claim 6,7 or 8, it is characterized in that: described admission line (A1) connects combustion furnace furnace gas efferent duct (9), the inlet end of this combustion furnace furnace gas efferent duct (9) is connected with combustion furnace (4), exhaust end is connected with admission line (A1), and the control valve (K2) being connected with temperature controller is installed on combustion furnace furnace gas efferent duct (9).
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| CN103908848B CN103908848B (en) | 2015-10-07 |
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|---|---|
| CN103908848B (en) | 2015-10-07 |
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Denomination of invention: Gas dust removal and purification method and system Granted publication date: 20151007 Pledgee: China Construction Bank Corporation Chengdu No.1 Sub-branch Pledgor: INTERMET TECHNOLOGIES CHENGDU Co.,Ltd. Registration number: Y2024980037528 |
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