CN201272780Y - Exhaust-heat boiler for fluidized bed coal gasification - Google Patents
Exhaust-heat boiler for fluidized bed coal gasification Download PDFInfo
- Publication number
- CN201272780Y CN201272780Y CNU2008201198128U CN200820119812U CN201272780Y CN 201272780 Y CN201272780 Y CN 201272780Y CN U2008201198128 U CNU2008201198128 U CN U2008201198128U CN 200820119812 U CN200820119812 U CN 200820119812U CN 201272780 Y CN201272780 Y CN 201272780Y
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- CN
- China
- Prior art keywords
- superheater
- heat boiler
- fluidized bed
- waste heat
- economizer
- 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.)
- Expired - Lifetime
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- 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
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a waste heat boiler for gasification in a fluidized bed, which comprises a high-temperature evaporator, a superheater, an evaporator and a coal economizer. The superheater, the evaporator and the coal economizer are equipped with water-tube boilers, and semicoke dust wears the segment of metals in the water-tube boilers little. The high-temperature evaporator utilizes an inclined fire tube structure, thereby effectively preventing air and water vapor generated in desalted water of a straight fire tube boiler from floating to the top of the fire tube and resulting in local overheating. The segments of the high-temperature evaporator, the superheater, the evaporator and the coal economizer are disposed in a steel container to form a combined structure, which is compact and is convenient for management. The coal economizer is made of alloy steel, thereby avoiding water at room temperature resulting in condensation and corrosion on the outer surfaces of the steel tubes.
Description
Technical field
The utility model relates to a kind of waste heat boiler, particularly a kind of fluidized bed coal gasification waste heat boiler.
Background technology
Waste heat boiler is to utilize high temperature logistics in the production process as the interchanger of thermal source producing steam in next life, and it is the water cooler of high temperature logistics in the technical process, is again to utilize waste heat that the power set of steam is provided.According to structure formation, waste heat boiler can be divided into shell-and-tube and chimney flue type.The structure of shell-and-tube waste heat boiler and tube and shell heat exchanger do not have much differences, and fixed tube sheet type, floating head type and U type tubular type etc. are arranged equally.By outside the interior still pipe of pipe, waste heat boiler is divided into fire tube heat recovery steam generator and waterpipe type waste heat boiler according to high-temperature gas.Tubular boiler be high-temperature flue gas in fire tube, flow through with pipe outside water, vapour or the steam water interface boiler that carries out heat exchange.Water tube donkey is that water flows through in the pipe, and high-temperature gas is flowed through and managed the outer boiler that carries out heat exchange.
In the fluidized bed burned-coal technology, Technology commonly used is the cooling of crude synthesis gas.It is 850-1000 ℃ that the crude synthesis gas of coal gasifier production goes out gasifier temperature, must just can enter desulfurization and the decarbonization process of next stage through dedusting and process for cooling, produces qualified purification synthetic gas.
Existing gasification waste heat boiler commonly used comprises high temperature superheater, superheater, vaporizer, economizer.This waste heat boiler is a fire tube boiler structure formation.
Chinese patent publication number CN2426069 discloses a kind of heat pipe waste heat boiler, comprises superheater, drum, vaporizer, economizer, and it has used heat pipe waste heat boiler.But, owing to contain a large amount of coal ash and semicoke in the crude synthesis gas of coal gasifier production, the tubular boiler inlet part is often produced wearing and tearing fast cause that pipe leaks left alone without help car, because its vaporizer is straight type tubular boiler, gas that its de-salted water produces and portion water steam float in the fire tube top and often cause local superheating, cause that the card of fire tube and the partial high temperature of fire tube burn.
In the prior art, high-temperature evaporator, superheater, vaporizer, four parts of economizer are placed apart, take up an area of big, also very complicated, the trouble of maintenance and maintenance.
In addition, the material of economizer adopts carbon steel, because the temperature of economizer generally can be too not high, just causes the outer surface of steel tube dewing corrosion easily.
The utility model content
The purpose of this utility model is to provide a kind of dust that can reduce in the crude synthesis gas to a kind of fluidized bed coal gasification waste heat boiler of the wearing and tearing of metal.
In order to solve the problems of the technologies described above, the utility model has adopted superheater, vaporizer and economizer to adopt the tubulous boiler structure, and the top high-temperature evaporator still adopts the scheme of fire tube boiler structure.
At first the flow through smoke pipe of top high-temperature evaporator of the crude synthesis gas of fluidized bed coal gasifier production is to the outer water of smoke pipe, vapour or steam water interface heating; Enter the shell side of superheater, vaporizer and economizer then successively, to water, vapour or the steam water interface heating of tube side.Crude synthesis gas is through overcooling and dust collecting process, forms to purify synthetic gas, enters process for refining such as the desulfurization of next stage and decarburization then.
Tubulous boiler is set can controls gas speed to one a lower speed (usually less than 10m/s) of crude synthesis gas more conveniently, the semicoke dust under the lower velocity in the synthetic gas is very little to the wearing and tearing of metal.The strict control of top high temperature fire tube boiler crude synthesis gas inlet gas speed (usually less than 15m/s), the often quick wear problems of tubular boiler inlet part just is readily solved.In high-temperature evaporator, because the hot strength of its strut member is not enough, the strut member metal has carburizing and atomizing possibility in carbon monoxide and the simultaneous reducing atmosphere of hydrogen simultaneously.So the district still keeps the use fire tube boiler at the top high temperature evaporation, used the high temperature strut member with minimizing.
Another improvement of the present utility model is to adopt inclined tube structure boiler 2 sections of top high-temperature evaporators, changed traditional straight type fire tube structure, effectively avoided the gas and the portion water steam of the de-salted water generation of straight type tubular boiler to float, caused that the card of fire tube and fire tube push up the problem that partial high temperature burns in fire tube top initiation local superheating.
Another improvement of the present utility model is that four sections of high-temperature evaporators, superheater, vaporizer, economizer are made integrated structure, this kind compact construction, convenient management with being put in the Steel Vessel.
Superheater of the present utility model, vaporizer and economizer partly are horizontal coil pipe, and shell installs the flange detaching structure simultaneously, adopt such improvement, if when boiler needs repairing, can extract coil pipe easily out, and as drawer, simple and convenient practicality.
Economizer of the present utility model adopts steel alloy, and all the other portions of establishing adopt carbon steel to make, and this kind mode can avoid the room temperature water purification to cause the outer surface of steel tube dewing corrosion.
Description of drawings
Fig. 1 is the structural representation of the utility model fluidized bed coal gasification with waste heat boiler.
Wherein: 1, waste heat boiler is suitable for reading; 2, high-temperature evaporator; 3, superheater; 4, vaporizer; 5, economizer; 6, oblique fire tube.
Embodiment
Provide a specific embodiment of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, fluidized bed coal gasification of the present utility model is made up of for 5 four sections high-temperature evaporator 2, superheater 3, vaporizer 4, economizer with waste heat boiler, with being put in the Steel Vessel, forms integrated structure.
1000 ℃ of crude synthesis gas that fluidized bed coal gasifier is produced at first enter waste heat boiler of the present utility model from waste heat boiler suitable for reading 1, and the oblique fire tube 6 of the top high-temperature evaporator 2 of flowing through heats the oblique fire tube 6 outer hot water from drum.The fire tube of high-temperature evaporator 2 adopts the inclined tube structure, the problem of effectively having avoided straight type tubular boiler top initiation local superheating, high temperature to burn.The preliminary cooled crude synthesis gas of process (about 800 ℃) enters the shell side of superheater 3 (exporting about 600 ℃), vaporizer 4 (exporting about 400 ℃) and economizer 5 (exporting about 220 ℃) then successively, to the water in the tube side, vapour or steam water interface heating.For reducing wear, the gas speed of control crude synthesis gas is water pipe Duan Weiyi lower speed (usually less than 10m/s).Crude synthesis gas forms and purifies synthetic gas through overcooling and dust collecting process, enters desulfurization and the decarbonization process of next stage.Economizer 5 of the present utility model adopts steel alloy, can avoid the room temperature water purification to cause outer surface of steel tube dewing corrosion problem like this.Vaporizer 4 of the present utility model, superheater 3 and economizer 5 parts are horizontal coil pipe, and shell installs the flange detaching structure simultaneously, and are very convenient during such structural repair.
Waste heat boiler of the present utility model is applicable to the supporting waste heat boiler of pressurized fluidized bed boiler and coal gasifier.Especially in preparation high humidity (37%) water-gas is synthetic, can be used for the working condition of high temperature (1100 ℃), dense dirt (contain coal fly ash, coal semicoke ash concentration reaches a few hectogram/standard cubic meter), high pressure (3.0Mpa).
Claims (6)
1, a kind of fluidized bed coal gasification waste heat boiler, comprise high-temperature evaporator (2), superheater (3), vaporizer (4), economizer (5), it is characterized in that: high-temperature evaporator (2) adopts fire tube boiler, superheater (3), vaporizer (4) and economizer (5) section employing tubulous boiler.
2, use waste heat boiler according to the described fluidized bed coal gasification of claim 1, it is characterized in that: described high-temperature evaporator (2) adopts the oblique fire tube structure.
3, use waste heat boiler according to the described fluidized bed coal gasification of claim 2, it is characterized in that: described high-temperature evaporator (2), superheater (3), vaporizer (4), economizer are put in the Steel Vessel together for (5) four sections, form integrated structure.
4, use waste heat boiler according to the described fluidized bed coal gasification of claim 3, it is characterized in that: described superheater (3), vaporizer (4), economizer (5) are the horizontal coil pipe.
5, use waste heat boiler according to the described fluidized bed coal gasification of claim 4, it is characterized in that: described superheater (3), vaporizer (4), economizer (5) section outer setting flange detaching structure.
6, use waste heat boiler according to each described fluidized bed coal gasification among the claim 1-5, it is characterized in that: described economizer (5) is used steel alloy, and all the other equipment adopt carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201198128U CN201272780Y (en) | 2008-05-27 | 2008-05-27 | Exhaust-heat boiler for fluidized bed coal gasification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201198128U CN201272780Y (en) | 2008-05-27 | 2008-05-27 | Exhaust-heat boiler for fluidized bed coal gasification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201272780Y true CN201272780Y (en) | 2009-07-15 |
Family
ID=40883128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201198128U Expired - Lifetime CN201272780Y (en) | 2008-05-27 | 2008-05-27 | Exhaust-heat boiler for fluidized bed coal gasification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201272780Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358849A (en) * | 2011-09-09 | 2012-02-22 | 华东理工大学 | Heat recovering type fuel gas preparation system and fuel gas preparation method thereof |
| CN102865567A (en) * | 2012-10-09 | 2013-01-09 | 大连科林能源工程技术开发有限公司 | Integrated gasification combined cycle (IGCC) process gas waste heat boiler |
-
2008
- 2008-05-27 CN CNU2008201198128U patent/CN201272780Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358849A (en) * | 2011-09-09 | 2012-02-22 | 华东理工大学 | Heat recovering type fuel gas preparation system and fuel gas preparation method thereof |
| CN102358849B (en) * | 2011-09-09 | 2013-12-25 | 华东理工大学 | Heat recovering type fuel gas preparation system and fuel gas preparation method thereof |
| CN102865567A (en) * | 2012-10-09 | 2013-01-09 | 大连科林能源工程技术开发有限公司 | Integrated gasification combined cycle (IGCC) process gas waste heat boiler |
| CN102865567B (en) * | 2012-10-09 | 2014-07-16 | 大连科林能源工程技术开发有限公司 | Integrated gasification combined cycle (IGCC) process gas waste heat boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |