CN104162351B - A kind of two sodium exhaust gas cleaner and purification methods thereof - Google Patents
A kind of two sodium exhaust gas cleaner and purification methods thereof Download PDFInfo
- Publication number
- CN104162351B CN104162351B CN201410078230.XA CN201410078230A CN104162351B CN 104162351 B CN104162351 B CN 104162351B CN 201410078230 A CN201410078230 A CN 201410078230A CN 104162351 B CN104162351 B CN 104162351B
- Authority
- CN
- China
- Prior art keywords
- gas
- heat exchanger
- reduction reactor
- ammonia reduction
- import
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of two sodium exhaust gas cleaner and purification methods thereof, it includes gas emission device, scrubbing tower, mist eliminator, cleaner unit, heat exchanger, electric heater, reducing gas tapping equipment, ammonia reduction reactor and exhaust apparatus, gas emission device, scrubbing tower, mist eliminator, cleaner unit is sequentially connected with, the outlet of cleaner unit is connected with the shell side import of heat exchanger, the shell-side outlet of heat exchanger is connected with the import of ammonia reduction reactor, reducing gas tapping equipment is connected with the import of ammonia reduction reactor, the outlet of ammonia reduction reactor is connected with the tube side import of heat exchanger, the tube side outlet of heat exchanger is connected with exhaust apparatus；It is provided with catalyst layer in ammonia reduction reactor.Present configuration is reasonable in design, and two sodium vent gas treatment are effective, and the nitrous oxides concentration of discharge is far below national standard；Use heat exchanger, it is not necessary to the gas before reaction is heated, saves the energy；Use desalted water cleaning catalyst layer, it is possible to achieve catalyst regenerates.
Description
Technical field
The present invention relates to a kind of two sodium exhaust gas cleaner and purification methods thereof, the sodium salt in removing two sodium tail gas.
Background technology
Two sodium refer to sodium nitrate and sodium nitrite, the exhaust temperature produced in two sodium production processes is relatively low, water content is higher, carbon dioxide content is of a relatively high, and containing certain density sodium salt (including sodium nitrate, sodium nitrite and sodium carbonate etc.) granule, the purification of the most inapplicable two sodium tail gas of conventional dust technology device exhaust cleaning catalyst.
Authorization Notice No. is in the Chinese utility model description of CN202527071U, disclose a kind of improvement nitric acid and two sodium production process tail gas ammonia reduction reactors, it is characterized in that: set beds in ammonia reduction reactor, beds is divided into two sections, top to be provided with offgas outlet.Prior art processes tail gas by ammonia reduction reactor to be needed to add ammonia, is all made by synthesis ammonia owing to ammonia is general, and price is high, causes with ammonia reduction waste gas cost the highest.And gas requires heat to certain temperature before entering ammonia reduction reactor, long-time use wastes the energy；File does not has tail gas after correlated response, the processing mode of waste water and the maintaining method of catalyst yet.
Summary of the invention
The technical problem to be solved is to overcome the above-mentioned deficiency in the presence of prior art, and provides a kind of reasonable in design, and energy-saving and emission-reduction can effectively protect environment, two sodium exhaust gas cleaner and the purification methods thereof that vent gas treatment is effective.
The present invention solves above-mentioned technical problem and be the technical scheme is that and the invention provides a kind of two sodium exhaust gas cleaners, it is characterized in that: it includes gas emission device, scrubbing tower, mist eliminator, cleaner unit, heat exchanger, reducing gas tapping equipment, ammonia reduction reactor and exhaust apparatus, gas emission device is connected with the import of scrubbing tower, the outlet of scrubbing tower is connected with the import of mist eliminator, the top exit of mist eliminator is connected with the import of cleaner unit, the outlet of cleaner unit is connected with the shell side import of heat exchanger, the shell-side outlet of heat exchanger is connected with the import of ammonia reduction reactor, reducing gas tapping equipment is connected with the import of ammonia reduction reactor, the outlet of ammonia reduction reactor is connected with the tube side import of heat exchanger, the tube side outlet of heat exchanger is connected with exhaust apparatus；Connected by pipeline between said structure；It is provided with catalyst layer in described ammonia reduction reactor.Owing to two sodium tail gas containing the NOx of high level and certain content sodium salt granule, overwhelming majority sodium salt composition (including sodium nitrate, sodium nitrite and sodium carbonate etc.) and part NOx in two sodium tail gas can be effectively removed after scrubbed tower high-efficient washing, can remove acid mist through mist eliminator, remaining acid mist and sodium salt granule are removed in cyclone dust removal；Gas before and after reaction can be carried out heat exchange by heat exchanger, makes the gas before reaction i.e. can reach demand temperature without electrical heating, saves the energy；Reacted gas is by being discharged in air after the tube side of heat exchanger, and nitrous oxides concentration meets national standard.
It is provided with electric heater, initial reaction stage gas before reacting by heating on pipeline between connection heat exchanger shell pass of the present invention outlet and ammonia reduction reactor import.
Being provided with circulating pump on mist eliminator of the present invention, the import of circulating pump is connected with the outlet at bottom of mist eliminator, and circulation delivery side of pump is connected with the side import of mist eliminator.Circulating pump adds desalted water, recycles, catch fog effect good.
Circulating pump of the present invention has two, and two circulating pumps are arranged in parallel mutually, strengthens catching fog effect.
Reducing gas discharged by reducing gas tapping equipment of the present invention, and reducing gas is gas ammonia or synthesis ammonia relief gas.Gas ammonia is from ammoxidation system, and in synthesis ammonia relief gas device, the volume content of ammonia is 60～80%.
The exit of ammonia reduction reactor of the present invention is provided with wastewater treatment equipment, is connected by pipeline between wastewater treatment equipment and the outlet of ammonia reduction reactor, and pipeline is provided with switch valve.Open switch valve, the waste water produced in reaction can be processed.
It is provided with removal bitter and fishiness on ammonia reduction reactor of the present invention, is connected by pipeline between removal bitter and fishiness with ammonia reduction reactor, pipeline is provided with switch valve.Use desalted water washing catalyst, it is possible to achieve catalyst regenerates, and the catalyst activity after regeneration keeps close substantially than fresh catalyst activity, and under identical conditions, conversion rate of NOx almost maintains an equal level.
Catalyst layer of the present invention has two-layer, two catalyst layers to be in parallel mutually, and the import of ammonia reduction reactor is between two catalyst layers.Mixed gas is respectively by two-layer catalyst, and reaction is fully；Two-layer catalyst parallel running, reduces the resistance of catalyst layer, improves efficiency.
Catalyst layer of the present invention is the non-precious metal catalyst with activated alumina as carrier.
Present invention also offers the purification method of a kind of two sodium exhaust gas cleaners, it is characterised in that: the purifying step of two sodium tail gas is:
(1) gas emission device discharges two sodium tail gas, enters scrubbing tower and washs, and removes major part sodium salt composition and part NOx in tail gas；Enter mist eliminator from scrubbing tower tail gas out and remove acid-mist-removing；Cleaner unit is gone to remove remaining acid mist and sodium salt granule from mist eliminator tail gas out；
(2) enter the shell side of heat exchanger from cleaner unit tail gas out, be heated to 150 DEG C from heat exchanger tail gas out by electric heater, and after mixing with reducing gas, entrance ammonia reduction reactor；
(3) temperature in ammonia reduction reactor is 180-220 DEG C, mixed gas is reacted under the effect of catalyst, removes the sodium salt in tail gas, and reacted gas temperature is 250 DEG C, gas enters the tube side of heat exchanger from the outlet of ammonia reduction reactor, carries out heat exchange with the gas before reaction；Gas temperature in heat exchanger shell pass raises, and the gas temperature in tube side reduces；After stable, the gas before reaction i.e. can reach 150 DEG C by heat exchanger heat exchange, it is not necessary to is heated by electric heater again；
(4), after reacted gas is by the tube side of heat exchanger, exports to exhaust apparatus by the tube side of heat exchanger, be discharged in air；
In above-mentioned steps (3), the waste water that ammonia reduction reactor produces, it is discharged to wastewater treatment equipment from pipeline；
When, after catalyst layer life-time service, removal bitter and fishiness being opened and connect the switch valve on pipeline, use desalted water washing catalyst, discharge after soaking 60-120 minute；Repeated washing process 3-5 time；Reusable heat air purging catalyst layer, by clean for liquid object purging in catalyst layer, discharges debris, it is achieved catalyst regenerates.
The present invention compared with prior art, has following positive effect: reasonable in design, two sodium vent gas treatment are effective, and the nitrous oxides concentration of discharge is less than 150ppm, far below national standard；Use heat exchanger, it is not necessary to the gas before reaction is heated, saves the energy；Use desalted water cleaning catalyst layer, it is possible to achieve catalyst regenerates, life-time service；Configuration wastewater treatment equipment, can process waste water in time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below by embodiment, the invention will be further described.
Embodiment 1:
The present embodiment includes gas emission device 1, scrubbing tower 2, mist eliminator 3, cleaner unit 4, heat exchanger 5, reducing gas tapping equipment 7, ammonia reduction reactor 8 and exhaust apparatus 9, gas emission device 1 is connected with the import of scrubbing tower 2, the outlet of scrubbing tower 2 is connected with the import of mist eliminator 3, the top exit of mist eliminator 3 is connected with the import of cleaner unit 4, the outlet of cleaner unit 4 is connected with the shell side import of heat exchanger 5, the shell-side outlet of heat exchanger 5 is connected with the import of ammonia reduction reactor 8, reducing gas tapping equipment 7 is connected with the import of ammonia reduction reactor 8, the outlet of ammonia reduction reactor 8 is connected with the tube side import of heat exchanger 5, the tube side outlet of heat exchanger 5 is connected with exhaust apparatus 9；Connected by pipeline 10 between said structure；It is provided with catalyst layer 11 in described ammonia reduction reactor 8.
In the present embodiment, connect and be provided with electric heater 6 on the pipeline 10 between heat exchanger 5 shell-side outlet and ammonia reduction reactor 8 import, initial reaction stage gas before reacting by heating.
In the present embodiment, mist eliminator 3 being provided with circulating pump 12, the import of circulating pump 12 is connected with the outlet at bottom of mist eliminator 3, and the outlet of circulating pump 12 is connected with the side import of mist eliminator 3.Circulating pump 12 has two, and two circulating pumps 12 are arranged in parallel mutually.Circulating pump 12 adds desalted water, recycles, catch fog effect good.
In the present embodiment, reducing gas discharged by reducing gas tapping equipment 7, and reducing gas is gas ammonia, and reducing gas tapping equipment 7 is from ammoxidation system.
In the present embodiment, the exit of ammonia reduction reactor 8 is provided with wastewater treatment equipment 14, is connected by pipeline 10, pipeline 10 is provided with switch valve 15 between wastewater treatment equipment 14 and the outlet of ammonia reduction reactor 8.Open switch valve 15, the waste water produced in reaction can be processed.
In the present embodiment, the exit of circulating pump 12 is provided with wastewater treatment equipment 14, is connected by pipeline 10, pipeline 10 is provided with switch valve 15 between wastewater treatment equipment 14 and the outlet of circulating pump 12.
In the present embodiment, ammonia reduction reactor 8 is provided with removal bitter and fishiness 16, is connected by pipeline 10 between removal bitter and fishiness 16 with ammonia reduction reactor 8, pipeline 10 is provided with switch valve 15.Use desalted water washing catalyst, it is possible to achieve catalyst regenerates, and the catalyst activity after regeneration keeps close substantially than fresh catalyst activity, and under identical conditions, conversion rate of NOx almost maintains an equal level.
In the present embodiment, catalyst layer 11 is the non-precious metal catalyst with activated alumina as carrier.The present embodiment uses N-847D low temperature high activity selective reduction catalyst, and prepared by Dalian Catalytic Engineering Technology Ltd. of the Dalian Chemistry and Physics Institute of the catalyst n-847D Chinese Academy of Sciences, the key technical indexes of catalyst is as shown in table 1 below.
Table
1
Catalyst
N-847D
The key technical indexes table
The purifying step of the present embodiment two sodium exhaust gas cleaner is:
(1) gas emission device 1 discharges two sodium tail gas, enters scrubbing tower 2 and washs, and removes major part sodium salt composition and part NOx in tail gas；Enter mist eliminator 3 from scrubbing tower 2 tail gas out and remove acid-mist-removing；Cleaner unit 4 is gone to remove remaining acid mist and sodium salt granule from mist eliminator 3 tail gas out；
(2) enter the shell side of heat exchanger 5 from cleaner unit 4 tail gas out, be heated to 150 DEG C from heat exchanger 5 tail gas out by electric heater 6, and after mix with gas ammonia, entrance ammonia reduction reactor 8；
(3) temperature in ammonia reduction reactor 8 is 180-220 DEG C, mixed gas is reacted under the effect of catalyst, removes the sodium salt in tail gas, and reacted gas temperature is 250 DEG C, gas enters the tube side of heat exchanger 5 from the outlet of ammonia reduction reactor 8, carries out heat exchange with the gas before reaction；Gas temperature in heat exchanger 5 shell side raises, and the gas temperature in tube side reduces；After stable, the gas before reaction i.e. can reach 150 DEG C by heat exchanger 5 heat exchange, it is not necessary to is heated by electric heater 6 again；
(4), after reacted gas is by the tube side of heat exchanger 5, exports to exhaust apparatus 9 by the tube side of heat exchanger 5, be discharged in air；
In above-mentioned steps (2), auxiliary air, while producing gas ammonia, is discharged in heat exchanger 5, mixes with two sodium tail gas, heat by reducing gas tapping equipment 7.Play the effect of regeneration, save the energy.
In above-mentioned steps (3), the waste water that ammonia reduction reactor 8 produces, it is discharged to wastewater treatment equipment 14 from pipeline 10；
When, after catalyst layer 11 life-time service, the switch valve 15 that removal bitter and fishiness 16 connects on pipeline 10 can be opened, use desalted water washing catalyst, discharge after soaking 60-120 minute；Repeated washing process 3-5 time；Reusable heat air purging catalyst layer 11, by clean for liquid object purging in catalyst layer 11, discharges debris, it is achieved catalyst regenerates.
The present embodiment exports nitrous oxides concentration the air discharged from the tube side of heat exchanger 5 and is less than 150 far below mg/Nm3, 300 mg/Nm3, (GB26131-2010 nitric acid industry pollutant emission national Specification: newly-built enterprise performed atmosphere pollution (nitrogen oxides) concentration of emission limit value: 300 mg/Nm from 1 day March in 20113), heat exchange can save energy, moreover it is possible to reduces the thermal pollution of discharge gas, protects environment.
Embodiment 2:
In the present embodiment, the content of catalyst layer 11 is same as in Example 1, and catalyst layer 11 is except for the difference that divided into two-layer, and two catalyst layers 11 is in parallel mutually, and the import of ammonia reduction reactor 8 is between two catalyst layers 11.Mixed gas by two-layer catalyst, is reacted more abundant respectively；Two-layer catalyst parallel running, reduces the resistance of catalyst layer 11, improves efficiency.
Remaining 26S Proteasome Structure and Function is same as in Example 1.
Although the present invention is open as above with embodiment, but it is not limited to protection scope of the present invention, any technical staff being familiar with this technology, in the change made without departing from the spirit and scope of the invention and retouching, all should belong to protection scope of the present invention.
Claims (7)
1. the purification method of a sodium exhaust gas cleaner, it is characterized in that: two described sodium exhaust gas cleaners include gas emission device, scrubbing tower, mist eliminator, cleaner unit, heat exchanger, reducing gas tapping equipment, ammonia reduction reactor and exhaust apparatus, gas emission device is connected with the import of scrubbing tower, the outlet of scrubbing tower is connected with the import of mist eliminator, the top exit of mist eliminator is connected with the import of cleaner unit, the outlet of cleaner unit is connected with the shell side import of heat exchanger, the shell-side outlet of heat exchanger is connected with the import of ammonia reduction reactor, reducing gas tapping equipment is connected with the import of ammonia reduction reactor, the outlet of ammonia reduction reactor is connected with the tube side import of heat exchanger, the tube side outlet of heat exchanger is connected with exhaust apparatus；Connected by pipeline between said structure；It is provided with catalyst layer in described ammonia reduction reactor；
Described catalyst layer has two-layer, two catalyst layers to be in parallel mutually, and the import of ammonia reduction reactor is between two catalyst layers；
Described catalyst layer is the non-precious metal catalyst with activated alumina as carrier；
The purifying step of two sodium tail gas is:
(1) gas emission device discharges two sodium tail gas, enters scrubbing tower and washs, and removes major part sodium salt composition and part NOx in tail gas；Enter mist eliminator from scrubbing tower tail gas out and remove acid-mist-removing；Cleaner unit is gone to remove remaining acid mist and sodium salt granule from mist eliminator tail gas out；
(2) enter the shell side of heat exchanger from cleaner unit tail gas out, be heated to 150 DEG C from heat exchanger tail gas out by electric heater, and after mixing with reducing gas, entrance ammonia reduction reactor；
(3) temperature in ammonia reduction reactor is 180-220 DEG C, mixed gas is reacted under the effect of catalyst, removes the sodium salt in tail gas, and reacted gas temperature is 250 DEG C, gas enters the tube side of heat exchanger from the outlet of ammonia reduction reactor, carries out heat exchange with the gas before reaction；Gas temperature in heat exchanger shell pass raises, and the gas temperature in tube side reduces；After stable, the gas before reaction i.e. can reach 150 DEG C by heat exchanger heat exchange, it is not necessary to is heated by electric heater again；
(4), after reacted gas is by the tube side of heat exchanger, exports to exhaust apparatus by the tube side of heat exchanger, be discharged in air；
In above-mentioned steps (2), auxiliary air, while producing gas ammonia, is discharged in heat exchanger (5), mixes with two sodium tail gas, heat by reducing gas tapping equipment (7)；
In above-mentioned steps (3), the waste water that ammonia reduction reactor produces, it is discharged to wastewater treatment equipment from pipeline；
When, after catalyst layer life-time service, removal bitter and fishiness being opened and connect the switch valve on pipeline, use desalted water washing catalyst, discharge after soaking 60-120 minute；Repeated washing process 3-5 time；Reusable heat air purging catalyst layer, by clean for liquid object purging in catalyst layer, discharges debris, it is achieved catalyst regenerates.
The purification method of two sodium exhaust gas cleaners the most according to claim 1, it is characterised in that: it is provided with electric heater on the pipeline between the outlet of described connection heat exchanger shell pass and ammonia reduction reactor import.
The purification method of two sodium exhaust gas cleaners the most according to claim 1 and 2, it is characterized in that: on described mist eliminator, be provided with circulating pump, the import of circulating pump is connected with the outlet at bottom of mist eliminator, and circulation delivery side of pump is connected with the side import of mist eliminator.
The purification method of two sodium exhaust gas cleaners the most according to claim 3, it is characterised in that: described circulating pump has two, and two circulating pumps are arranged in parallel mutually.
The purification method of two sodium exhaust gas cleaners the most according to claim 1 and 2, it is characterised in that: reducing gas discharged by described reducing gas tapping equipment, and reducing gas is gas ammonia or synthesis ammonia relief gas.
The purification method of two sodium exhaust gas cleaners the most according to claim 1 and 2, it is characterized in that: the exit of described ammonia reduction reactor is provided with wastewater treatment equipment, it is connected by pipeline between wastewater treatment equipment and the outlet of ammonia reduction reactor, pipeline is provided with switch valve.
The purification method of two sodium exhaust gas cleaners the most according to claim 1 and 2, it is characterised in that: it is provided with removal bitter and fishiness on described ammonia reduction reactor, is connected by pipeline between removal bitter and fishiness with ammonia reduction reactor, pipeline is provided with switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078230.XA CN104162351B (en) | 2014-03-05 | 2014-03-05 | A kind of two sodium exhaust gas cleaner and purification methods thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078230.XA CN104162351B (en) | 2014-03-05 | 2014-03-05 | A kind of two sodium exhaust gas cleaner and purification methods thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104162351A CN104162351A (en) | 2014-11-26 |
| CN104162351B true CN104162351B (en) | 2016-08-24 |
Family
ID=51906450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410078230.XA Active CN104162351B (en) | 2014-03-05 | 2014-03-05 | A kind of two sodium exhaust gas cleaner and purification methods thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104162351B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201783294U (en) * | 2010-09-01 | 2011-04-06 | 中国海洋石油总公司 | Treatment device for NOX gas in tail gas produced by nitrate |
| CN102380314A (en) * | 2011-11-03 | 2012-03-21 | 杭州龙山化工有限公司 | Ammonia reduction reactor |
| CN202893188U (en) * | 2012-11-14 | 2013-04-24 | 中国石油天然气股份有限公司 | Tail gas treatment system for nitric acid production equipment |
| CN203764140U (en) * | 2014-03-05 | 2014-08-13 | 杭州龙山化工有限公司 | Double-sodium tail gas purifying device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226103A (en) * | 1993-02-05 | 1994-08-16 | Sumitomo Heavy Ind Ltd | Recycling of exhaust gas treatment catalyst and treatment of exhaust gas |
-
2014
- 2014-03-05 CN CN201410078230.XA patent/CN104162351B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201783294U (en) * | 2010-09-01 | 2011-04-06 | 中国海洋石油总公司 | Treatment device for NOX gas in tail gas produced by nitrate |
| CN102380314A (en) * | 2011-11-03 | 2012-03-21 | 杭州龙山化工有限公司 | Ammonia reduction reactor |
| CN202893188U (en) * | 2012-11-14 | 2013-04-24 | 中国石油天然气股份有限公司 | Tail gas treatment system for nitric acid production equipment |
| CN203764140U (en) * | 2014-03-05 | 2014-08-13 | 杭州龙山化工有限公司 | Double-sodium tail gas purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104162351A (en) | 2014-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103894051A (en) | Wet-type smoke desulphurization and denitrification integrated system and method | |
| CN102974200B (en) | Oxynitride waste gas treatment device and oxynitride waste gas treatment method | |
| CN207822779U (en) | One kind emission-control equipments of VOCs containing ammonia | |
| CN105318443A (en) | Air purifier | |
| CN211886052U (en) | Waste gas treatment system | |
| CN206911092U (en) | A kind of high-efficiency desulfurization denitrating system using ozone oxidation | |
| CN106540529A (en) | A kind of gas pollutant integrated treatment unit | |
| CN206404519U (en) | A kind of exhaust treatment system | |
| CN104056538B (en) | Flue gas purifying system and method with integration of desulfurization and denitrification | |
| CN201701856U (en) | Absorption bed and organic waste gas purifying system using same | |
| CN215352781U (en) | Device for treating waste gas in waste battery crushing process | |
| CN203764140U (en) | Double-sodium tail gas purifying device | |
| CN206881476U (en) | A kind of device of plasmaassisted ammonia absorption coal-fired flue-gas simultaneous SO_2 and NO removal decarburization | |
| CN203253354U (en) | Spraying organic waste gas purifying device | |
| CN104162351B (en) | A kind of two sodium exhaust gas cleaner and purification methods thereof | |
| CN101927125B (en) | Dual-circulation absorption tower | |
| CN107020004A (en) | A kind of apparatus and method of plasmaassisted ammonia absorption coal-fired flue-gas simultaneous SO_2 and NO removal decarburization | |
| CN106964245B (en) | High-efficient processing apparatus of nitrogen oxide waste gas during iron oxide pigment production | |
| CN201949789U (en) | Absorption treatment device for acidolysis tail gas of titanium white | |
| CN213078024U (en) | High concentration ethylene oxide exhaust treatment device | |
| CN205019939U (en) | Coke oven flue gas processing system | |
| CN209952555U (en) | Smoke treatment system for red mud wet rotary kiln | |
| CN210845867U (en) | Organic waste gas treatment system in pharmaceutical industry | |
| CN211612048U (en) | Exhaust gas purification device for environmental protection of factory | |
| CN107469588A (en) | SO in industrial tail gas can be reduced2The device and its exhaust gas treating method of concentration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |