CN206955967U - A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system - Google Patents
A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system Download PDFInfo
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- CN206955967U CN206955967U CN201720847308.9U CN201720847308U CN206955967U CN 206955967 U CN206955967 U CN 206955967U CN 201720847308 U CN201720847308 U CN 201720847308U CN 206955967 U CN206955967 U CN 206955967U
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- fused salt
- coke oven
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- steam generator
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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
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Abstract
It the utility model is related to a kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system.It is made up of one cyclonic deduster, second cyclone dust extractor, fused salt electric heater, fused salt heat exchanging device, pump for liquid salts, steam generator, water circulating pump and connecting line.Wherein, crude gas pipeline is connected with one cyclonic deduster, two stage cyclone deduster is connected by pipeline, the bottom of two stage cyclone deduster is connected with ash discharge pipeline, second cyclone dust extractor is connected with fused salt heat exchanging device, and outer benefit molten salt pipeline is connected through fused salt electric heater with fused salt heat exchanging device, and fused salt heat exchanging device is connected through pump for liquid salts and fused salt return line with steam generator, it is connected simultaneously with raw coke oven gas outlet pipe, middle pressure steam pipeline and desalted water pipeline are connected with steam generator.The utility model can effectively remove the dust in raw coke oven gas, while obtain 3.5 ~ 4.5MPa middle pressure saturated vapor, effectively reclaim the high-grade heat in raw coke oven gas.
Description
Technical field
A kind of heat recovery system, the specifically purification of lignite pyrolysis raw coke oven gas and energy recovery system are the utility model is related to,
Belong to energy recovery technical field.
Background technology
Lignite is a kind of brownish black, lacklustre low-grade coal, is a kind of normal pressure, temperature by the raw coke oven gas of Rapid-pyrolysis
About 700~900 DEG C, and contain the coal gas of the heavy components such as solid dust and tar such as a certain amount of semicoke, lignite heat under high temperature
The dust of solution raw coke oven gas entrainment easily causes the harm such as blocking, erosive wear to follow-up equipment and pipeline, it is necessary to remove in time, but by
It is low in lignite pyrolysis raw gas temperature height, pressure, dust is difficult to realize using the methods of conventional membrane filtration or bag-type dust
Effectively removing, simultaneously because lignite pyrolysis raw coke oven gas is higher than heavy components contents such as the tar of traditional coke oven raw coke oven gas, work as high temperature
When raw coke oven gas drops to certain temperature, the heavy component such as tar in raw coke oven gas is easier to separate out in heat exchange interface, causes pipeline to hinder
Plug, it is difficult that effective removal of heat is carried out to lignite pyrolysis raw coke oven gas using traditional hot means that take, therefore existing raw coke oven gas removes
It is to use the direct chilling technology of ammoniacal liquor mostly in dirt temperature-fall period, 700~900 DEG C or so of height is made using substantial amounts of cyclic ammonia water
Warm raw coke oven gas is rapidly reduced to 80 DEG C or so, and realizes dedusting purpose, but the high-grade heat of raw coke oven gas also transition into 80 DEG C it is low attached
Value added vapor and hot water, had both wasted the heat in raw coke oven gas, needs to consume substantial amounts of cyclic ammonia water again, causes energy
And the wasting of resources.Therefore it is very necessary to seek more excellent lignite pyrolysis raw coke oven gas purification heating picking process.Chinese patent
CN201110439739.9 discloses a kind of coke oven coke oven uprising tube raw coke oven gas waste heat recycle method and equipment, and the invention utilizes de-
Salt solution carries out moving heat indirectly to raw coke oven gas, by-product steam, although heat recovery can be carried out to raw coke oven gas to a certain extent, simultaneously
It is no substantially to solve the problems, such as that raw coke oven gas causes the heavy components such as tar to separate out blocking pipeline because local temperature is too low.China
Patent CN201110256107.9 discloses a kind of waste heat of coke oven crude gas recoverying and utilizing method and special heat exchange type ascending tube, should
Invention takes thermal medium by the use of gases such as argon gas, carbon dioxide and nitrogen as raw coke oven gas, the weight such as tar in raw coke oven gas is ensured
In the case that matter component does not separate out, heat is accessed being carried out raw coke oven gas, thermal medium is taken after heating, enter back into the dress such as waste heat boiler
Put, by-product steam, although this technique can to a certain extent to raw coke oven gas carry out heat recovery, due to gas specific heat compared with
It is low, need substantial amounts of recyclegas to carry out taking hot operation in use so that take thermal excessive, cost of investment is higher,
And above two technique is not carrying out effective dedirt before taking heat to the dust in raw coke oven gas, the abrasion of equipment is higher.
Utility model content
The purpose of this utility model is that providing a kind of lignite is pyrolyzed raw coke oven gas purifying and dedusting and high-grade heat recovery system,
The dust of raw coke oven gas entrained with can effectively be removed and reclaim the heat of the high-grade in raw coke oven gas.
The technical scheme in the invention for solving the technical problem is as follows：
A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system, are revolved by one cyclonic deduster 2, two level
Wind deduster 3, fused salt electric heater 13, fused salt heat exchanging device 4, pump for liquid salts 11, steam generator 5, water circulating pump 9 and connecting line
Composition.In system composition, crude gas pipeline 1 is connected with the air inlet of the upper left quarter of one cyclonic deduster 2, one cyclonic dedusting
The gas outlet at the top of device 2 is connected with the air inlet in the left side of second cyclone dust extractor 3, the ash discharging hole of the bottom of one cyclonic deduster 2
It is connected with the ash discharging hole of the bottom of second cyclone dust extractor 3 with ash discharge pipeline 15；The exhaust outlet at the top of second cyclone dust extractor 3 with
The tube-side inlet at the top of fused salt heat exchanging device 4 is connected, tube side gas outlet and the phase of raw coke oven gas outlet pipe 10 of the bottom of fused salt heat exchanging device 4
Even；Outer benefit molten salt pipeline 14 is connected with the charging aperture of the lower left quarter of fused salt electric heater 13, and the upper right quarter of fused salt electric heater 13 goes out
Mouth is connected through valve 12 with the shell side inlet of the lower left quarter of fused salt heat exchanging device 4, and the shell-side outlet of the upper right quarter of fused salt heat exchanging device 4 is through fused salt
Pump 11 is connected with the shell side inlet of the lower left quarter of steam generator 5, and the shell-side outlet of the lower right side of steam generator 5 flows back through fused salt
Pipeline 8 is connected with the entrance of the lower left quarter shell side of fused salt heat exchanging device 4, the gas outlet at the top of steam generator 5 and middle pressure vapor line 6
It is connected, the tube side import of the right upper portion of steam generator 5 is connected with desalted water pipeline 7, the discharge outlet warp of the bottom of steam generator 5
Water circulating pump 9 is connected with desalted water pipeline 7.
In the utility model, the described tube side air inlet of fused salt heat exchanging device 4 carries expansion arc, and material is austenitic steel or table
Face carries the carbon steel of refractory material.
In the utility model, described pump for liquid salts 11 is vertical-type axial-flow pump.
In the utility model, described steam generator 5 is Falling film heat transfer device or waste heat boiler.
Operation principle of the present utility model is as follows：The high temperature raw coke oven gas come from pyrolysis oven enters one-level through crude gas pipeline 1
Cyclone dust collectors, second cyclone dust extractor remove the dust in raw coke oven gas, and the raw coke oven gas after dedusting enters fused salt heat exchanging device 4 with melting
The fused salt for melting state is exchanged heat, and the fused salt after heat exchange heating enters the middle pressure steam that steam generator 5 produces 3.5~4.5MPa,
Fused salt after cooling returns to fused salt heat exchanging device 4 via fused salt return line 8 and recycled；
Operating procedure is during concrete application：Raw coke oven gas from 700~900 DEG C or so of lignite pyrolysis oven is through crude gas pipeline
1 enters the air inlet of the upper left quarter of one cyclonic deduster 2, and the raw coke oven gas after the rough dusting of one cyclonic deduster 2 enters back into
Second cyclone dust extractor 3 carries out further dust removal process, obtains dedusting raw coke oven gas, the discharge of the bottom of one cyclonic deduster 2
The dust that dust is discharged with the bottom of second cyclone dust extractor 3 is collected into ash discharge pipeline 15；Dedusting raw coke oven gas enters molten
Salt heat exchanger 4 is exchanged heat with temperature for the fused salt of 400~450 DEG C of molten states, and the temperature after heat exchange is 450~550 DEG C of famine
Coal gas enters subsequent handling after entering raw coke oven gas outlet pipe 10, and the high-temperature molten salt that the temperature after heat exchange is 450~500 DEG C is through molten
Salt pump 11 is exchanged heat into steam generator 5 with the desalted water from desalted water pipeline 7, and desalted water is via steam generator 5
Pressure vapor line 6 during gas outlet of the 3.5~4.5Mpa middle pressure steam through the top of steam generator 5 enters is obtained after heat exchange to receive
Collection, the outlet at bottom of steam generator 5 flow out unvaporized desalted water and recycled through the return desalted water of water circulating pump 9 pipeline 7, passed through
Temperature is reduced to 400~500 DEG C of fused salt and returns to the circulation of fused salt heat exchanging device 4 through fused salt return line 8 and makes after steam generator 5 exchanges heat
With.Fused salt electric heater 13 and valve 12 are in open mode in system starting process, and after system run all right, fused salt electricity adds
Hot device 13 and valve 12 are in closed mode.
What the utility model obtained has the beneficial effect that：
1. the utility model carries out dust removal process using two stage cyclone deduster to raw coke oven gas, can be in high temperature, the work of low pressure
The dust in lignite pyrolysis raw coke oven gas is effectively removed under condition, had both avoided the danger such as blocking of the dust to follow-up workshop section, erosive wear
Evil, the high-grade heat in raw coke oven gas is remained again.
2. carrying the heat-resisting fused salt heat exchanging device of expansion arc using tube side air inlet, raw coke oven gas is set more to be uniformly dispersed in molten
In each tube bank in salt heat exchanger, ensure that each several part temperature in heat transfer process is homogeneous with fused salt for raw coke oven gas, and pass through adjustment
The internal circulating load of fused salt, on the premise of the heavy component such as tar does not separate out in ensureing raw coke oven gas, make the high-grade heat in raw coke oven gas
It is changed into the middle pressure steam of high added value, has effectively reclaimed the high-grade heat in raw coke oven gas.
3. the utility model whole process is not required to consumption cooling water and does not also produce waste water, the dosage of water is few, reduces environmental protection
Pressure, operating cost are relatively low.
Brief description of the drawings
Fig. 1 is pipeline connection diagram of the present utility model.
Label implication is as follows in figure：
1st, crude gas pipeline 2, one cyclonic deduster 3, second cyclone dust extractor 4, fused salt heat exchanging device 5, steam occur
Device 6, it is middle pressure vapor line 7, desalted water pipeline 8, fused salt return line 9, water circulating pump 10, raw coke oven gas outlet pipe 11,
Pump for liquid salts 12, valve 13, fused salt electric heater 14, outer benefit molten salt pipeline 15, ash discharge pipeline.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
Embodiment 1
It is shown in Figure 1, a kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system, removed by one cyclonic
Dirt device 2, second cyclone dust extractor 3, fused salt electric heater 13, fused salt heat exchanging device 4, pump for liquid salts 11, steam generator 5, recirculated water
Pump 9 forms.In system composition, crude gas pipeline 1 is connected with the air inlet of the upper left quarter of one cyclonic deduster 2, one cyclonic
The gas outlet at the top of deduster 2 is connected with the air inlet in the left side of second cyclone dust extractor 3, the row of the bottom of one cyclonic deduster 2
Grey mouth is connected with the ash discharging hole of the bottom of second cyclone dust extractor 3 with ash discharge pipeline 15；The exhaust at the top of second cyclone dust extractor 3
Mouth is connected with the tube-side inlet at the top of fused salt heat exchanging device 4, tube side gas outlet and the raw coke oven gas outlet pipe of the bottom of fused salt heat exchanging device 4
10 are connected；Outer benefit molten salt pipeline 14 is connected with the charging aperture of the lower left quarter of fused salt electric heater 13, the upper right quarter of fused salt electric heater 13
Outlet be connected through valve 12 with the entrance of the lower left quarter shell side of fused salt heat exchanging device 4, the outlet of the upper right quarter shell side of fused salt heat exchanging device 4 warp
Pump for liquid salts 11 is connected with the entrance of the lower left quarter shell side of steam generator 5, and the shell-side outlet of the lower right side of steam generator 5 is through fused salt
Return line 8 is connected with the entrance of the lower left quarter shell side of fused salt heat exchanging device 4, the gas outlet at the top of steam generator 5 and middle pressure steam
Pipeline 6 is connected, and the tube side import of the right upper portion of steam generator 5 is connected with desalted water pipeline 7, the row of the bottom of steam generator 5
The mouth of a river is connected through water circulating pump 9 with desalted water pipeline 7.
The present embodiment, the described tube side air inlet of fused salt heat exchanging device 4 carry expansion arc, and material is austenitic steel.Described
Pump for liquid salts 11 is vertical-type axial-flow pump.Described steam generator 5 is Falling film heat transfer device.
The operation principle of system is described below：From lignite pyrolysis oven 60000Nm3/ h raw coke oven gas, temperature be 900 DEG C,
Dust content about 4.8g/Nm3, the air inlet of the upper left quarter of one cyclonic deduster 2 is entered through crude gas pipeline 1, is removed through one cyclonic
Raw coke oven gas after the rough dusting of dirt device 2, which enters back into second cyclone dust extractor 3, to carry out further dust removal process and obtains dedusting famine coal
The dust of gas, the dust from the discharge of the bottom of one cyclonic deduster 2 and the discharge from the bottom of second cyclone dust extractor 3, which enters, to be arranged
Grey pipeline 15 is collected, and dirt removal efficiency reaches 85% or so in high temperature raw coke oven gas；Dedusting raw coke oven gas enters fused salt heat exchanging device 4, with
Temperature is that the fused salt of 410 DEG C of molten state is exchanged heat, and the dedusting raw gas temperature after heat exchange is reduced to 480 DEG C, into waste coal
Gas outlet pipe 10 enters subsequent handling, and the high-temperature molten salt that temperature is 460 DEG C after heat exchange enters steam generator 5 through pump for liquid salts 11
Exchanged heat with the desalted water from desalted water pipeline 7, desalted water obtains 13.6t/h's after being exchanged heat via steam generator 5
Steam is pressed in 4Mpa saturation, pressure vapor line 6 is collected during the gas outlet through the top of steam generator 5 enters, steam generator 5
Outlet at bottom flows out unvaporized desalted water and recycled through the return desalted water of water circulating pump 9 pipeline 7, is changed through steam generator 5
Temperature, which is reduced to 410 DEG C of fused salt and returns to fused salt heat exchanging device 4 through fused salt return line 8, after heat recycles, the wherein circulation of fused salt
Measure as 506t/h.Fused salt electric heater 13 and valve 12 are in open mode in described system starting process, work as system operation
After stable, fused salt electric heater 13 and valve 12 are in closed mode.
Claims (4)
1. a kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system, it is characterised in that by one cyclonic deduster
（2）, second cyclone dust extractor（3）, fused salt electric heater（13）, fused salt heat exchanging device（4）, pump for liquid salts（11）, steam generator
（5）, water circulating pump（9）And connecting line composition, wherein, crude gas pipeline（1）With one cyclonic deduster（2）Upper left quarter
Air inlet is connected, one cyclonic deduster（2）The gas outlet at top and second cyclone dust extractor（3）The air inlet phase of upper left-hand
Even, one cyclonic deduster（2）The ash discharging hole and second cyclone dust extractor of bottom（3）The ash discharging hole of bottom with ash discharge pipeline
（15）It is connected, second cyclone dust extractor（3）The exhaust outlet and fused salt heat exchanging device at top（4）The tube-side inlet at top is connected, fused salt
Heat exchanger（4）The tube side gas outlet of bottom and raw coke oven gas outlet pipe（10）It is connected, outer benefit molten salt pipeline（14）Add with fused salt electricity
Hot device（13）The charging aperture of lower left quarter is connected, fused salt electric heater（13）The outlet of upper right quarter is through valve（12）With fused salt heat exchanging device
（4）The shell side inlet of lower left quarter is connected, fused salt heat exchanging device（4）Upper right quarter shell-side outlet is through pump for liquid salts（11）With steam generator
（5）The shell side inlet of lower left quarter is connected, steam generator（5）The shell-side outlet of lower right side is through fused salt return line（8）With melting
Salt heat exchanger（4）The shell side inlet of lower left quarter is connected, steam generator（5）The gas outlet at top and middle pressure vapor line（6）Phase
Even, steam generator（5）The tube side import of right upper portion and desalted water pipeline（7）It is connected, steam generator（5）The draining of bottom
Mouth is through water circulating pump（9）With desalted water pipeline（7）It is connected.
2. recovery system according to claim 1, it is characterised in that fused salt heat exchanging device（4）Tube side air inlet is with expansion
Section, material are the carbon steel that austenitic steel or surface carry refractory material.
3. recovery system according to claim 1, it is characterised in that pump for liquid salts（11）For vertical-type axial-flow pump.
4. recovery system according to claim 1, it is characterised in that steam generator（5）For Falling film heat transfer device or waste heat boiler
Stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847308.9U CN206955967U (en) | 2017-07-13 | 2017-07-13 | A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847308.9U CN206955967U (en) | 2017-07-13 | 2017-07-13 | A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system |
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| Publication Number | Publication Date |
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| CN206955967U true CN206955967U (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720847308.9U Active CN206955967U (en) | 2017-07-13 | 2017-07-13 | A kind of lignite pyrolysis raw coke oven gas purifying and dedusting and high-grade heat recovery system |
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- 2017-07-13 CN CN201720847308.9U patent/CN206955967U/en active Active
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