CN105567340A - NHD purification system for IGCC power station - Google Patents
NHD purification system for IGCC power station Download PDFInfo
- Publication number
- CN105567340A CN105567340A CN201410551968.3A CN201410551968A CN105567340A CN 105567340 A CN105567340 A CN 105567340A CN 201410551968 A CN201410551968 A CN 201410551968A CN 105567340 A CN105567340 A CN 105567340A
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- CN
- China
- Prior art keywords
- nhd
- purification system
- power station
- igcc power
- decarbonizing tower
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- Industrial Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention belongs to the field of gas processing and provides an NHD purification system for an IGCC power station. IGCC is integrated gasification combined cycle. by conducting hydrolysis on feed gas subjected to coal gasification with warm water, COS in the feed gas can be converted into H2S, and the problem that the COS absorption capability of NHD purification is limited is solved. In addition, the system makes full use of the selectivity of NHD on the H2S and the COS, utilizes a CO2 saturated NHD solution to absorb sulfide and reduces the energy consumption of a device. After treatment is performed by using the NHD purification system, the total sulfur of the NHD purification system is smaller than or equal to 1 ppmv, and CO2 is smaller than or equal to 0.2%.
Description
Technical field
The invention belongs to gas manufacture field, relate to a kind of NHD purification system for IGCC power station, particularly adopt the selectivity of NHD solution, with by CO
2satisfied NHD solution absorbs the method for sulfide.
Background technology
IGCC is the abbreviation of integrated gasification combined cycle plants, and Coal Chemical Industry and power industry are integrated in one by it, effectively reduce NO
x, SO
2and CO
2discharge, be a kind of Filter Tuber For Clean Coal Development Technology.
The technological process of IGCC comprises gasification system, purification system, gas turbine engine systems part.
IGCC purification portion divides current technology to have MDEA method, low-temperature rectisol method etc.Wherein MDEA method is to H
2s and CO
2selectivity be 3 ~ 4.Also more CO is stripped of while MDEA desulfurization
2.Low-temperature rectisol method operates at low temperatures, and lean solution service temperature is-50 ~-70 DEG C, and vapourizing furnace gas out need through cooling process, and whole process energy consumption is higher.
Summary of the invention
The object of the invention is to adopt a kind of novel NHD purification system, for IGCC power station, effectively reduce the energy consumption of IGCC power station purification part.
Technical conceive of the present invention is by unstripped gas by medium temperature hydrolyzation, and the COS in unstripped gas is converted into H
2s, solves NHD and purifies the limited problem of COS receptivity.Meanwhile, because NHD is to H
2s and CO
2selectivity reach 8 ~ 9, native system makes full use of NHD to H
2selectivity between S and COS, utilizes by CO
2satisfied NHD solution absorbs sulfide, reduces the energy consumption of device.
For achieving the above object, the present invention takes following technical measures: for the NHD purification system in IGCC power station, it is characterized in that:
A) first the unstripped gas coming autopneumatolysis island enters medium temperature hydrolyzation device, and the COS contained in gas is hydrolyzed to CO
2and H
2s;
B) utilize by CO
2satisfied NHD solution processes sulfide, reduces the energy consumption of device.
Specifically, the present invention also has following characteristics:
(1) first unstripped gas enters medium temperature hydrolyzation, hydrolysis temperature 130 ~ 230 DEG C;
(2) after hydrolysis, gas is cooled to 30 ~ 40 DEG C and enters thionizer;
(3) rich solution bottom decarbonizing tower is divided into two portions, and a part enters thionizer, and another part enters in the middle part of decarbonizing tower;
(4) flow proportional entering in the middle part of decarbonizing tower and enter thionizer is 2 ~ 4;
(5) solution enters the temperature of thionizer is 30 ~ 40 DEG C, and the solution temperature entered in the middle part of decarbonizing tower is 30 ~ 40 DEG C;
(6) solution enters the temperature on decarbonizing tower top is-5 DEG C ~ 5 DEG C.
COS in unstripped gas, by the unstripped gas after gasification is passed through medium temperature hydrolyzation, is converted into H by the present invention
2s, solves NHD and purifies the limited problem of COS receptivity.Meanwhile, native system makes full use of NHD to H
2selectivity between S and COS, utilizes by CO
2satisfied NHD solution absorbs sulfide, reduces the energy consumption of device.After process of the present invention, go out NHD purification system total sulfur≤1ppmv, CO
2≤ 0.2%.
Accompanying drawing explanation
Fig. 1 is the general flow chart of embodiment of the present invention system.
In figure, 1-medium temperature hydrolyzation groove; 2-thionizer; 3-decarbonizing tower; 4-regenerator column; 5,6,7,8,9,10,11,12-interchanger; 13-compressor; 14-desulfurization flash drum; 15-decarburization high flash slot; 16-decarburization flash drum; 17,18,19-pump.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with embodiment and accompanying drawing.
Following examples system flow as shown in Figure 1, main technologic parameters: first unstripped gas enters medium temperature hydrolyzation, hydrolysis temperature 130 ~ 230 DEG C; After hydrolysis, gas is cooled to 30 ~ 40 DEG C and enters thionizer; Rich solution bottom decarbonizing tower is divided into two portions, and a part enters thionizer, and another part enters in the middle part of decarbonizing tower; The flow proportional entering in the middle part of decarbonizing tower and enter thionizer is 2 ~ 4; The temperature that solution enters thionizer is 30 ~ 40 DEG C, and the solution temperature entered in the middle part of decarbonizing tower is 30 ~ 40 DEG C; The temperature that solution enters decarbonizing tower top is-5 DEG C ~ 5 DEG C.
Embodiment: as shown in Figure 1, the temperature 40 DEG C that gasification island is come, pressure is 3.3MPaA, and flow is 300Nm
3/ h, containing H
235%, CO42%, CO
219.6%, H
2s+COS0.3%, N
22%, the unstripped gas of Ar1.1% is introduced into medium temperature hydrolyzation groove 1, and COS is hydrolyzed into H
2s, percent hydrolysis is 85% ~ 95%.Gas after hydrolysis enters bottom thionizer 2 through water-cooled cooling to 40 DEG C, the 1m under spraying with top
3/ hNHD solution counter current contact, removes sulfide in unstripped gas to 5ppmv, and eject from thionizer 1 sweet gas come and enter bottom decarbonizing tower 3, the solution counter current contact with spraying from top and middle part, removes the CO wherein contained
2.Go out the CO that decarbonizing tower 3 pushes up
2content is < 0.2% (v).Top flow is 1m
3/ h, the solution flow at middle part is 4m
3/ h.Bottom decarbonizing tower 3, liquid is out divided into two portions, and a part removes thionizer, goes in the middle part of decarbonizing tower after another part flash distillation.Go the solution temperature on decarbonizing tower top to be-5 DEG C, go the temperature after water-cooled of the solution in the middle part of decarbonizing tower to be 40 DEG C.
Claims (7)
1., for the NHD purification system in IGCC power station, it is characterized in that:
A) first the unstripped gas coming autopneumatolysis island enters medium temperature hydrolyzation device, and the COS contained in gas is hydrolyzed to CO
2and H
2s;
B) utilize by CO
2satisfied NHD solution processes sulfide, reduces the energy consumption of device.
2. the NHD purification system for IGCC power station according to claims 1, is characterized in that the service temperature of medium temperature hydrolyzation device is at 150 ~ 230 DEG C, is cooled to 30 ~ 40 DEG C to enter thionizer after hydrolysis.
3. the NHD purification system for IGCC power station according to claims 1, it is characterized in that the rich solution bottom decarbonizing tower is divided into two portions, a part removes thionizer, and a part is gone in the middle part of decarbonizing tower after flash distillation.
4. the NHD purification system for IGCC power station according to claims 1, it is characterized in that thionizer by CO
2the cooled temperature of satisfied rich solution is 30 ~ 40 DEG C.
5. the NHD purification system for IGCC power station according to claims 1, is characterized in that the semi lean solution temperature of decarbonizing tower is 30 ~ 40 DEG C.
6. the NHD purification system for IGCC power station according to claims 1, the lean solution temperature after heat exchange that it is characterized in that bottom regenerator column is-5 ~ 5 DEG C and enters decarbonizing tower, from decarbonizing tower its top feed.
7. the NHD purification system for IGCC power station according to claims 1, is characterized in that the NHD semi lean solution that enters in the middle part of decarbonizing tower and the NHD lean solution flow proportional entered from decarbonizing tower top are 2 ~ 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551968.3A CN105567340A (en) | 2014-10-17 | 2014-10-17 | NHD purification system for IGCC power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551968.3A CN105567340A (en) | 2014-10-17 | 2014-10-17 | NHD purification system for IGCC power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105567340A true CN105567340A (en) | 2016-05-11 |
Family
ID=55877981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410551968.3A Pending CN105567340A (en) | 2014-10-17 | 2014-10-17 | NHD purification system for IGCC power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105567340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107115787A (en) * | 2017-05-12 | 2017-09-01 | 华能（天津）煤气化发电有限公司 | A kind of device systems and method for efficiently alleviating MDEA solution deterioration rates based on integral gasification combined circulation technology |
Citations (5)
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|---|---|---|---|---|
| US2649166A (en) * | 1950-05-02 | 1953-08-18 | Allied Chem & Dye Corp | Absorption of carbon dioxide from gases containing the same |
| CN102238995A (en) * | 2008-12-04 | 2011-11-09 | 环球油品公司 | Integrated warm gas desulfurization and gas shift for cleanup of gaseous streams |
| CN102413902A (en) * | 2009-04-08 | 2012-04-11 | 国际壳牌研究有限公司 | Method of treating acid gas stream and apparatus therefor |
| CN102659102A (en) * | 2012-05-24 | 2012-09-12 | 兖矿鲁南化肥厂 | Technology and device for preparing industrial carbon monoxide with water gas |
| CN203626905U (en) * | 2013-11-04 | 2014-06-04 | 中国科学院工程热物理研究所 | Saturated steam turbine power generating system applied to independent gasification island |
-
2014
- 2014-10-17 CN CN201410551968.3A patent/CN105567340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649166A (en) * | 1950-05-02 | 1953-08-18 | Allied Chem & Dye Corp | Absorption of carbon dioxide from gases containing the same |
| CN102238995A (en) * | 2008-12-04 | 2011-11-09 | 环球油品公司 | Integrated warm gas desulfurization and gas shift for cleanup of gaseous streams |
| CN102413902A (en) * | 2009-04-08 | 2012-04-11 | 国际壳牌研究有限公司 | Method of treating acid gas stream and apparatus therefor |
| CN102659102A (en) * | 2012-05-24 | 2012-09-12 | 兖矿鲁南化肥厂 | Technology and device for preparing industrial carbon monoxide with water gas |
| CN203626905U (en) * | 2013-11-04 | 2014-06-04 | 中国科学院工程热物理研究所 | Saturated steam turbine power generating system applied to independent gasification island |
Non-Patent Citations (1)
| Title |
|---|
| 林民鸿等: "NHD法脱硫脱碳净化技术", 《化学工业与工程技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107115787A (en) * | 2017-05-12 | 2017-09-01 | 华能（天津）煤气化发电有限公司 | A kind of device systems and method for efficiently alleviating MDEA solution deterioration rates based on integral gasification combined circulation technology |
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |