CN104593091A - Method and device for gas dehydration - Google Patents
Method and device for gas dehydration Download PDFInfo
- Publication number
- CN104593091A CN104593091A CN201510011014.8A CN201510011014A CN104593091A CN 104593091 A CN104593091 A CN 104593091A CN 201510011014 A CN201510011014 A CN 201510011014A CN 104593091 A CN104593091 A CN 104593091A
- Authority
- CN
- China
- Prior art keywords
- dehydration
- gas
- dehydration tower
- tower
- valve
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
- C10K1/22—Apparatus, e.g. dry box purifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
- C10K1/26—Regeneration of the purifying material contains also apparatus for the regeneration of the purifying material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Drying Of Gases (AREA)
Abstract
The invention relates to a method and a device for gas dehydration. The device comprises a water-containing gas pipeline, a high-temperature flue gas pipeline, a first dehydration tower, a second dehydration tower, a gas processing unit and a flue gas afterheat recovery unit, wherein the gas dehydration process comprises dehydration and dehydrating agent regeneration, and comprises the following specific steps: (1) a dehydration process, 1 feeding the water-containing gas to the first dehydration tower, and carrying out chemical reaction to generate a water-containing compound, 2 feeding the dehydrated gas to the gas processing unit, and 3 switching when the moisture content of the gas is greater than 10PPM; and (2) a regeneration process, 4 feeding the high-temperature flue gas to the first dehydration tower to regenerate the dehydrating agent, and 5 feeding the water-containing flue gas to the flue gas afterheat recovery unit, and alternately carrying out dehydration and dehydrating agent regeneration by the first dehydration tower and the second dehydration tower. No waste water is generated in the overall process; the pollution to the environment is reduced and avoided; the dehydration cost is low; the afterheat and a precious tail gas resource in the treatment process are fully utilized; and the device and the method are energy-saving and environment-friendly.
Description
Technical field
The invention belongs to coal gas processing technology field, relate to a kind of coal gas dry-method dehydration technique, be specifically related to a kind of method and apparatus of dehydration of gas.
Background technology
General gas flow dewaters, and adopts the method for condensation, but containing a large amount of pollutents etc. in gas in water of condensation.Such as coke oven tail gas purification traditional technology, coal gas sprays with a large amount of cyclic ammonia water in bridge tube and effuser, coal gas is made to be cooled to 82 ~ 86 DEG C, in coal gas primary cooler, being cooled to 25 ~ 35 DEG C again, (transverse pipe initial cooler generally sprays with the ammoniacal liquor containing certain tar and washes naphthalene, thus reach purification coal gas, reduce the object of resistance).Coal gas after primary cooler, enters gas blower, delivers to gas washing purification section by gas blower with 25000pa pressure after electrical tar precipitator trapping tar fog.Again through washing hydrogen sulfide respectively, washing ammonia, washing benzene, the coal gas after purification is sent outside, if also need further methanol wash column as the unstripped gas producing LNG.Coke oven tail gas purification traditional technology produces a large amount of waste water, complicated component, and be difficult to process, general treatment process does not all reach emission standard.
Summary of the invention
The object of this invention is to provide a kind of method of dehydration of gas, avoid treating processes to produce a large amount of waste water and be difficult to process, reduce the expense of processed, and make full use of the waste heat for the treatment of processes and valuable tail gas resource.Another object of the present invention is to provide a kind of device of dehydration of gas.
Technical scheme of the present invention is: the method for dehydration of gas, and comprise dehydration and dewatering agent regenerative process, concrete steps are as follows:
(i) dehydration
(1) 300 ~ 500 DEG C of moisture-laden gas enter the first dehydration tower through No. 1 T-valve, and moisture-laden gas and dewatering agent carry out chemical reaction and produce aquo compound;
(2) dewater the pneumatic outlet of coal gas through dehydration tower top and No. 2 T-valve to-coal gas machining cell;
(3), when the moisture content going out the dehydration coal gas after dehydration tower is greater than 10PPM, switch, namely moisture-laden gas enters the second dehydration tower through No. 1 T-valve, and the pneumatic outlet then through dehydration tower top and No. 1 T-valve are to coal gas machining cell;
(ii) regenerative process
(4) the high-temperature flue gas of 300 ~ 800 DEG C enters the first dehydration tower through No. 3 T-valve and regenerates dewatering agent, by aquo compound thermal degradation;
(5) regenerate the humid flue gas after dewatering agent through No. 4 T-valve to flue gas waste heat recovery unit;
First dehydration tower and the second dehydration tower hocket and dewater and dewatering agent regeneration.
Dewatering agent is metal or metal oxide, and metal is calcium, sodium, potassium, magnesium, copper, aluminium or iron, and described metal oxide is calcium oxide, sodium oxide, potassium oxide, magnesium oxide, cupric oxide, aluminum oxide or ferric oxide.Magnesian dehydration temperaturre is 300 ~ 400 DEG C, and regeneration temperature is 400 ~ 500 DEG C.The dehydration temperaturre of aluminum oxide is 100 ~ 150 DEG C, and regeneration temperature is 200 ~ 300 DEG C.The dehydration temperaturre of calcium oxide is 300 ~ 500 DEG C, and regeneration temperature is 500 ~ 800 DEG C.The dehydration temperaturre of other dewatering agent controls at 0 ~ 500 DEG C, and regeneration temperature is 100 ~ 800 DEG C.The water content of moisture-laden gas is 20 ~ 300g/Nm
3, the water content of dehydration coal gas is 5 ~ 10PPM.Moisture-laden gas is coke-oven gas, blue charcoal tail gas or calcium carbide tail gas.Do not get rid of other and need moisture gas.
Realize the coal gas dehydration of above-mentioned dehydration of gas method, comprise moisture-laden gas pipeline, high temperature flue gas pipeline, the first dehydration tower, the second dehydration tower, coal gas machining cell and flue gas waste heat recovery unit.Moisture-laden gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 1 T-valve, and high temperature flue gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 3 T-valve.First dehydration tower is connected with coal gas machining cell by connection No. 2 T-valve with the second dehydration tower.First dehydration tower is connected with flue gas waste heat recovery unit by No. 4 T-valve with the second dehydration tower.
First dehydration tower and the second dehydration tower are oscillatory type sieve-tray tower structure, and oscillatory type sieve-tray tower is respectively equipped with 12 layers of column plate, and every layer of column plate adds the thick dewatering agent of 400 ~ 600mm.
The method of dehydration of gas of the present invention is dry method dewatering, and compared with traditional gas dehydration technique, maximum feature is that whole technological process does not use water; do not produce waste water, avoid the pollution for the treatment of processes to surrounding environment, processed expense is low; be conducive to environment protection, reduce production cost.Make full use of the waste heat for the treatment of processes and valuable tail gas resource, turn waste into wealth, energy-conserving and environment-protective.The device of dehydration of gas of the present invention creates basis for realizing the dehydration of above-mentioned coal gas dry-method.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of coal gas dehydration of the present invention.
Wherein:
1-No. 1 T-valve, the 2-the first dehydration tower, 3-No. 2 T-valve, 4-coal gas machining cell, 5-No. 3 T-valve, the 6-the second dehydration tower, 7-No. 4 T-valve, 8-flue gas waste heat recovery unit.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.Scope is not limited to embodiment, and those skilled in the art make any change and also belong to the scope of protection of the invention in the scope that claim limits.
The device of this law dehydration of gas as shown in Figure 1, comprises moisture-laden gas pipeline, high temperature flue gas pipeline, the first dehydration tower 2, second dehydration tower 6, coal gas machining cell 4 and flue gas waste heat recovery unit 8.Moisture-laden gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 1 T-valve 1, and high temperature flue gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 3 T-valve 5.First dehydration tower is connected with coal gas machining cell 4 by connection No. 2 T-valve 3 with the second dehydration tower; First dehydration tower is connected with flue gas waste heat recovery unit 8 by No. 4 T-valve 7 with the second dehydration tower.First dehydration tower and the second dehydration tower are oscillatory type sieve-tray tower structure, and described oscillatory type sieve-tray tower is respectively equipped with 12 layers of column plate, and every layer of column plate adds the thick dewatering agent calcium oxide of 500mm.
Embodiment 1
Coke-oven gas dewaters, and dewatering agent is calcium oxide, and process comprises dehydration and dewatering agent regeneration, and concrete steps are:
(i) dehydration
(1) water content is 200g/Nm
3, 450 DEG C of moisture coke-oven gas enter the first dehydration tower 2 through No. 1 T-valve 1, and moisture-laden gas and dewatering agent calcium oxide carry out chemical reaction and produce aquo compound calcium hydroxide;
(2) dewater the pneumatic outlet of coal gas through dehydration tower top and No. 2 T-valve 3 to coal gas machining cell 4, the water content of dehydration coal gas is 5 ~ 6PPM;
(3) when going out the moisture content 11PPM of the dehydration coal gas after dehydration tower, switch, namely moisture coke-oven gas enters the second dehydration tower 6 through No. 1 T-valve 1, and the pneumatic outlet then through dehydration tower top and No. 1 T-valve 1 are to coal gas machining cell 4;
(ii) regenerative process
(4) the high-temperature flue gas of 600 DEG C enters the first dehydration tower 2 pairs of dewatering agents through No. 3 T-valve 5 and regenerates, and aquo compound calcium hydroxide thermal degradation is become calcium oxide;
(5) regenerate the humid flue gas after dewatering agent through No. 4 T-valve 7 to flue gas waste heat recovery unit 8;
First dehydration tower and the second dehydration tower hocket and dewater and dewatering agent regeneration.
Embodiment 2
Blue charcoal tail gas dehydration, dewatering agent is aluminum oxide, and process comprises dehydration and dewatering agent regeneration, and concrete steps are:
(i) dehydration
(1) water content is 150g/Nm
3, 150 DEG C of moisture blue charcoal tail gas enter the first dehydration tower 2 through No. 1 T-valve 1, and moisture-laden gas and dewatering agent aluminum oxide carry out chemical reaction and produce aquo compound;
(2) dewater the pneumatic outlet of coal gas through dehydration tower top and No. 2 T-valve 3 to coal gas machining cell 4, the water content of dehydration coal gas is 6 ~ 7PPM;
(3) when going out the moisture content 12PPM of the dehydration coal gas after dehydration tower, switch, namely moisture coke-oven gas enters the second dehydration tower 6 through No. 1 T-valve 1, and the pneumatic outlet then through dehydration tower top and No. 1 T-valve 1 are to coal gas machining cell 4;
(ii) regenerative process
(4) the high-temperature flue gas of 250 DEG C enters the first dehydration tower 2 pairs of dewatering agents through No. 3 T-valve 5 and regenerates, and aquo compound calcium hydroxide thermal degradation is become aluminum oxide;
(5) regenerate the humid flue gas after dewatering agent through No. 4 T-valve 7 to flue gas waste heat recovery unit 8;
First dehydration tower and the second dehydration tower hocket and dewater and dewatering agent regeneration.
Claims (5)
1. a method for dehydration of gas, comprise dehydration and dewatering agent regenerative process, concrete steps are as follows:
Dehydration
[1] 300 ~ 500 DEG C of moisture-laden gas enters the first dehydration tower (2) through No. 1 T-valve (1), and moisture-laden gas and dewatering agent carry out chemical reaction and produce aquo compound;
[2] pneumatic outlet of coal gas through dehydration tower top and No. 2 T-valve (3) are dewatered to coal gas machining cell (4);
[3] when the moisture content going out the dehydration coal gas after dehydration tower is greater than 10PPM, switch, namely moisture-laden gas enters the second dehydration tower (6) through No. 1 T-valve (1), and the pneumatic outlet then through dehydration tower top and No. 1 T-valve (1) are to coal gas machining cell (4);
Regenerative process
The high-temperature flue gas of [4] 300 ~ 800 DEG C enters the first dehydration tower (2) through No. 3 T-valve (5) and regenerates dewatering agent, by aquo compound thermal degradation;
[5] humid flue gas after dewatering agent is regenerated through No. 4 T-valve (7) to flue gas waste heat recovery unit (8);
First dehydration tower and the second dehydration tower hocket and dewater and dewatering agent regeneration.
2. the method for dehydration of gas according to claim 1, it is characterized in that: described dewatering agent is metal or metal oxide, described metal is calcium, sodium, potassium, magnesium, copper, aluminium or iron, and described metal oxide is calcium oxide, sodium oxide, potassium oxide, magnesium oxide, cupric oxide, aluminum oxide or ferric oxide.
3. the method for dehydration of gas according to claim 2, is characterized in that: described magnesian dehydration temperaturre is 300 ~ 400 DEG C, and regeneration temperature is 400 ~ 500 DEG C; The dehydration temperaturre of described aluminum oxide is 100 ~ 150 DEG C, and regeneration temperature is 200 ~ 300 DEG C; The dehydration temperaturre of described calcium oxide is 300 ~ 500 DEG C, and regeneration temperature is 500 ~ 800 DEG C.
4. a device for dehydration of gas method, is characterized in that: described device comprises moisture-laden gas pipeline, high temperature flue gas pipeline, the first dehydration tower (2), the second dehydration tower (6), coal gas machining cell (4) and flue gas waste heat recovery unit (8); Described moisture-laden gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 1 T-valve (1), and described high temperature flue gas pipeline is connected with the first dehydration tower and the second dehydration tower by No. 3 T-valve (5); First dehydration tower is connected with coal gas machining cell (4) by connection No. 2 T-valve (3) with the second dehydration tower; First dehydration tower is connected with flue gas waste heat recovery unit (8) by No. 4 T-valve (7) with the second dehydration tower.
5. the device of dehydration of gas according to claim 4, is characterized in that: described first dehydration tower and the second dehydration tower are oscillatory type sieve-tray tower structure, and described oscillatory type sieve-tray tower is respectively equipped with 12 layers of column plate, and every layer of column plate adds the thick dewatering agent of 400 ~ 600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011014.8A CN104593091A (en) | 2015-01-10 | 2015-01-10 | Method and device for gas dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011014.8A CN104593091A (en) | 2015-01-10 | 2015-01-10 | Method and device for gas dehydration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104593091A true CN104593091A (en) | 2015-05-06 |
Family
ID=53119160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510011014.8A Pending CN104593091A (en) | 2015-01-10 | 2015-01-10 | Method and device for gas dehydration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104593091A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135438A (en) * | 2015-08-12 | 2015-12-09 | 石家庄新华能源环保科技股份有限公司 | Rubbish combined treatment device |
| CN105861076A (en) * | 2016-06-02 | 2016-08-17 | 中冶华天工程技术有限公司 | Horizontal type spray cooling and dewatering integrated system for gas |
| CN105885960A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Vertical coal gas desalting and dewatering integrated system |
| CN105885961A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Horizontal gas washing and dehydrating integrated system |
| CN105885959A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Vertical coal gas washing and dewatering integrated system |
| CN105950226A (en) * | 2016-06-02 | 2016-09-21 | 中冶华天工程技术有限公司 | Vertical type spray cooling and dehydration integrated system for coal gas |
| CN105950228A (en) * | 2016-06-02 | 2016-09-21 | 中冶华天工程技术有限公司 | Horizontal gas desalting and dewatering integrated system |
-
2015
- 2015-01-10 CN CN201510011014.8A patent/CN104593091A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135438A (en) * | 2015-08-12 | 2015-12-09 | 石家庄新华能源环保科技股份有限公司 | Rubbish combined treatment device |
| CN105135438B (en) * | 2015-08-12 | 2017-08-01 | 石家庄新华能源环保科技股份有限公司 | A kind of device of Combined Treatment rubbish |
| CN105950228A (en) * | 2016-06-02 | 2016-09-21 | 中冶华天工程技术有限公司 | Horizontal gas desalting and dewatering integrated system |
| CN105885961A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Horizontal gas washing and dehydrating integrated system |
| CN105885959A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Vertical coal gas washing and dewatering integrated system |
| CN105950226A (en) * | 2016-06-02 | 2016-09-21 | 中冶华天工程技术有限公司 | Vertical type spray cooling and dehydration integrated system for coal gas |
| CN105885960A (en) * | 2016-06-02 | 2016-08-24 | 中冶华天工程技术有限公司 | Vertical coal gas desalting and dewatering integrated system |
| CN105861076A (en) * | 2016-06-02 | 2016-08-17 | 中冶华天工程技术有限公司 | Horizontal type spray cooling and dewatering integrated system for gas |
| CN105885960B (en) * | 2016-06-02 | 2018-10-02 | 中冶华天工程技术有限公司 | Vertical coal gas desalting and dewatering integral system |
| CN105950228B (en) * | 2016-06-02 | 2018-10-02 | 中冶华天工程技术有限公司 | Horizontal coal gas desalting and dewatering integral system |
| CN105885961B (en) * | 2016-06-02 | 2018-10-02 | 中冶华天工程技术有限公司 | The horizontal dewatering integrated system of gas washing |
| CN105950226B (en) * | 2016-06-02 | 2018-10-02 | 中冶华天工程技术有限公司 | Coal gas vertical spray cooling and dewatering integral system |
| CN105885959B (en) * | 2016-06-02 | 2018-10-02 | 中冶华天工程技术有限公司 | Vertical coal gas washing dehydration integral system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104593091A (en) | Method and device for gas dehydration | |
| CN102181308B (en) | Vacuum potassium carbonate coke oven gas desulfurization-sulfuric acid preparation process and processing system thereof | |
| CN104087354B (en) | A kind of technique utilizing yellow phosphoric tail gas synthetic natural gas | |
| CN103409175A (en) | Purifying and tar recovery system for high temperature gas containing ash and tar and method thereof | |
| CN104357071A (en) | Method for directionally producing biomass charcoal, biomass oil and biomass gas through microwave catalytic pyrolysis of biomass | |
| CN211367496U (en) | Blast furnace gas desulfurization and regeneration gas treatment system | |
| CN101708431B (en) | Advanced treatment method of sulfur dioxide in sulfuric acid tail gas | |
| CN101955806B (en) | Full negative pressure coke oven gas purification integrated process | |
| CN104984628A (en) | Organic waste gas adsorption recovery process | |
| CN204417446U (en) | A kind of device of dehydration of gas | |
| CN113754167B (en) | Method for recovering ammonia from coking wastewater | |
| CN103301718B (en) | The device of a kind of recovery, concentrated sulfur dioxide in tail gas | |
| CN204469495U (en) | A kind of device of industrial tail gas dehydration | |
| CN115745266A (en) | System and method for treating high-calcium high-salt wastewater by capturing carbon dioxide in smelting plant flue gas | |
| CN212215533U (en) | Energy-conserving process systems of active carbon regeneration for purification waste water | |
| CN212127523U (en) | Combined treatment system for waste sulfuric acid and acid gas | |
| CN204816558U (en) | Novel activated carbon fiber adsorption material regeneration device | |
| CN109679675B (en) | Method and system for producing low-carbon olefin by using semi-coke tail gas | |
| CN202829975U (en) | Coke oven coal gas refining and purification assembly line with dry and wet combination method | |
| CN203498341U (en) | Semi-coke tail gas desulfurization purifying device | |
| CN107084401B (en) | The pretreatment upgrading system and method for high sodium high calcium coal in a kind of burning of oxygen/carbon dioxide | |
| CN202304454U (en) | Double-pressure waste heat recovery system for flue gas acid making in copper smelting | |
| CN110227337A (en) | CO in a kind of pair of cement kiln end flue gas2Trapping concentrate with utilize system | |
| CN204825007U (en) | Condensing equipment is retrieved to mercury | |
| CN204265714U (en) | A kind of device of coke oven gas purification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150506 |
|
| RJ01 | Rejection of invention patent application after publication |