CN106215631A - System and method for treating methanol in pulverized coal gasification vented carbon dioxide - Google Patents
System and method for treating methanol in pulverized coal gasification vented carbon dioxide Download PDFInfo
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- CN106215631A CN106215631A CN201610670912.9A CN201610670912A CN106215631A CN 106215631 A CN106215631 A CN 106215631A CN 201610670912 A CN201610670912 A CN 201610670912A CN 106215631 A CN106215631 A CN 106215631A
- Authority
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- China
- Prior art keywords
- carbon dioxide
- methanol
- emptying
- desalted water
- coal
- 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.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 221
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 207
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 112
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 110
- 239000003245 coal Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000002309 gasification Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 26
- 238000012360 testing method Methods 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000790917 Dioxys <bee> Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- -1 olefin hydrocarbon Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Substances OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Industrial Gases (AREA)
Abstract
The invention discloses a system for treating methanol contained in discharged carbon dioxide of pulverized coal gasification, which comprises: the cooling device comprises an air inlet end for discharging carbon dioxide gas and an ammonia cooler; the washing device comprises a water washing tower. Meanwhile, the invention also provides a method for treating the emptied carbon dioxide gas of pulverized coal gasification, which comprises the following steps: cooling the vented carbon dioxide gas to below 30 ℃; and fully contacting and washing the cooled carbon dioxide gas with desalted water to remove the methanol in the carbon dioxide gas. The system and the method have the advantages of simple flow, high automation degree, economy and feasibility, and ensure that the emptying carbon dioxide meets the requirements of environmental protection or recycling.
Description
Technical field
The present invention relates to technical field of coal chemical industry, particularly relate to a kind of coal gasification that processes and be vented methanol in carbon dioxide
System and method.
Background technology
Modern Coal-based Chemical China development rapidly, coal liquifaction (coal direct liquefaction, indirect liquefaction), olefin hydrocarbon making by coal
(MTO, MTP), coal aromatic hydrocarbons, natural gas from coal, coal-ethylene glycol, coal derived DME etc., all achieved with important achievement.Except coal
Outside direct liquefaction, Modern Coal-based Chemical industrial chain is nearly all with Coal Gasification for technique source.Therefore, Coal Gasification Technology is modern
The basal core of Coal Chemical Industry.Powdered coal pressuring gasified is a kind of important Coal Gasification Technology.
In recent years, persistently there is wide range of haze weather in China, and the concern that atmospheric environment causes heats up day by day.And at fine coal
Substantial amounts of carbon dioxide, CO can be discharged during pressurization2Middle methanol content is up to 200～300ppm, and directly discharge can be to ring
Border pollutes, so objectively needing a kind of economically viable process CO2The system and method that middle methanol exceeds standard.
Summary of the invention
It is an object of the invention to surpass for methanol content in the carbon dioxide of discharge in fine coal pressure process in prior art
Target problem, it is provided that a kind of flow process is simple, automaticity is high, economically viable process coal gasification is vented first in carbon dioxide
The system of alcohol, it is ensured that emptying carbon dioxide meets the requirement of environmental protection or recycling.
The present invention is to be achieved through the following technical solutions:
A kind of coal gasification that processes is vented the system of methanol in carbon dioxide, including: chiller, including emptying titanium dioxide
The inlet end of carbon gas and ammonia cooler；Wash mill, including water scrubber.
Further, described chiller also includes anhydrous ammonia tank, and described anhydrous ammonia tank is by choke valve with ammonia cooler even
Connect.
Further, described water scrubber is provided with desalted water flow control valve and Liquid level adjusting valve.
Further, described water scrubber is packed tower.
Meanwhile, present invention also offers a kind of coal gasification that processes and be vented the method for methanol, the method bag in carbon dioxide
Include following steps:
1) emptying carbon dioxide is cooled to less than 30 DEG C；
2) carbon dioxide after cooling is fully contacted washing with desalted water.
Flow process that the method for the present invention is used is as it is shown in figure 1, method that the present invention is detailed further below.
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal from methanol
Lock hopper is pressurizeed, and the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into powder
Coal bag filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes emptying carbon dioxide dustiness be less than
Or equal to 10mg/L, emptying carbon dioxide gas temperature now is about 80 DEG C.
Carry out being cooled to less than 30 DEG C through ammonia cooler by the emptying carbon dioxides of about 80 DEG C, preferably shorter than 25
DEG C, more preferably less than 20 DEG C.
The carbon dioxide containing methanol after Bei Lengque enters water scrubber from below, and desalted water enters washing tower top
Portion, the two is fully contacted mixing, washing in water scrubber, washes away most methanol in carbon dioxide, make methanol enter into de-
In saline, make from tower top carbon dioxide out methanol content less than 50mg/L, thus meet the requirement of environmental protection.Wash from tower top
The carbon dioxide washed out can be directly discharged to air or recycling.
Liquefied ammonia from anhydrous ammonia tank enters ammonia cooler through choke valve, carries out flash distillation and becomes gas ammonia, absorbs a large amount of simultaneously
Heat, thus cool down enter ammonia cooler carbon dioxide.Gas ammonia is circulated utilization through overcompression.
Desalted water passes through flow control valve, enters the top of water scrubber, with the dioxy containing methanol bottom water scrubber
Changing carbon gas to carry out being sufficiently mixed washing, make methanol enter in desalted water, the desalted water containing methanol flows out bottom water scrubber,
Entrance gasification installation recycles, by the flow of Flux Valve Control desalted water.
Due to the emptying carbon dioxide A1 from bag filter, flow is cyclically-varying, in order to improve except first
The efficiency of alcohol also economizes in raw materials, and desalted water C1 flow does proportional control to A1 flow, according to the stream of A1 Flow-rate adjustment desalted water
Amount, the mass ratio of desalted water and emptying carbon dioxide is between 0.02～0.1, and desalted water flow is not less than making water scrubber
Dry plate minimum discharge.
From the emptying carbon dioxide of bag filter, flow is cyclically-varying, and a cycle is 30min～60min,
So water scrubber prioritizing selection packed tower, but it is not limited only to packed tower.
Wherein, the filler of packed tower includes structured packing M125Y or Pall ring rustless steel random packing.
In order to overcome the pressure drop of the resistance of ducting and water scrubber, the pressure of emptying carbon dioxide A1 is not less than
0.03MPag。
Beneficial effects of the present invention is as follows:
The present invention provides that a set of flow process is simple, automaticity is high, economically viable process coal gasification emptying titanium dioxide
The system and method for the methanol contained in carbon, it is ensured that emptying carbon dioxide meets the requirement of environmental protection or recycling, this
Methanol concentration in dropping a hint can be reduced to below 50mg/L by bright system and method, removes methanol in emptying carbon dioxide
Except effect can reach more than 90%.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention；
Wherein, V-01 is anhydrous ammonia tank, and E-01 is ammonia cooler, and C-01 is water scrubber；PV-01 is liquefied ammonia choke valve, FV-01
For desalted water flow control valve, LV-01 is water scrubber Liquid level adjusting valve；A1 is the emptying carbon dioxide gas from bag filter
Body, A2 is the carbon dioxide containing methanol after cooling, and A3 is the carbon dioxide meeting environmental requirement；B1 is liquid
Ammonia, B2 gas ammonia, B3 is through the gas ammonia of ammonia cooler, and C1 is desalted water, and C2 is the desalted water containing methanol.
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, and should not limit this with this
The protection domain of invention.
Embodiment 1
What the present invention provided processes the system of methanol in coal gasification emptying carbon dioxide, including chiller and washing dress
Put.Described chiller includes inlet end and the ammonia cooler being vented carbon dioxide, and described ammonia cooler is for by coal gasification
During produce emptying carbon dioxide be cooled to less than 30 DEG C.Described wash mill includes water scrubber, described water scrubber
For the carbon dioxide after cooling is fully contacted washing with desalted water, it is specially the dioxy containing methanol after being cooled
Change carbon gas and enter water scrubber from below, be fully contacted with the desalted water come in from top of tower so that methanol enters in desalted water,
Washing away most methanol in carbon dioxide, the desalted water containing methanol flows out bottom water scrubber, enters gasification installation and returns
Receive and utilize.
Wherein, described water scrubber preferably selects packed tower, but is not limited only to packed tower, and its filler can include structured packing
M125Y or Pall ring rustless steel random packing.
Described water scrubber is additionally provided with desalted water flow control valve and Liquid level adjusting valve.Desalted water flow control valve is used for controlling
The flow of desalted water processed so that desalted water is 0.02～0.10 with the mass ratio of carbon dioxide；
Liquid level adjusting valve is positioned at bottom water scrubber, when desalted water and carbon dioxide are fully contacted after washing completes,
Desalted water containing methanol flows out bottom water scrubber, and Liquid level adjusting valve can control the flow containing methanol desalted water.
Embodiment 2
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and testing methanol content in this gas is 280ppm, and gas pressure is
0.04MPag。
By the emptying carbon dioxide that methanol content is 280ppm, after ammonia is cooled to 30 DEG C, enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.05, and tests methanol content in tower top carbon dioxide out, result be methanol content be 46ppm.
Embodiment 3
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and testing methanol content in this gas is 260ppm, and gas pressure is
0.04MPag。
By the emptying carbon dioxide that methanol content is 260ppm, after ammonia is cooled to 25 DEG C, enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.06, and tests methanol content in tower top carbon dioxide out, result be methanol content be 19ppm.
Embodiment 4
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and testing methanol content in this gas is 260ppm, and gas pressure is
0.04MPag。
By the emptying carbon dioxide that methanol content is 260ppm, after ammonia is cooled to 20 DEG C, enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.06, and tests methanol content in tower top carbon dioxide out, result be methanol content be 1ppm.
Embodiment 5
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and testing methanol content in this gas is 280ppm, and gas pressure is
0.06MPag。
By the emptying carbon dioxide that methanol content is 280ppm, after ammonia is cooled to 18 DEG C, enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.02, and tests methanol content in tower top carbon dioxide out, result be methanol content be 24ppm.
Embodiment 6
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and testing methanol content in this gas is 260ppm, and gas pressure is
0.03MPag。
By the emptying carbon dioxide that methanol content is 260ppm, after ammonia is cooled to 15 DEG C, enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.10, and tests methanol content in tower top carbon dioxide out, result be methanol content be 19ppm.
Comparative example
The carbon dioxide containing methanol of workshop section is washed through carbon dioxide buffer tank to coal gasification apparatus coal lock hopper from methanol
Pressurizeing, the carbon dioxide of coal lock hopper pressure leak process discharge, through restriction orifice or air relief valve, is emitted into fine coal pocket type mistake
Filter, is filtered to remove most fine coal that carbon dioxide is carried secretly, makes carbon dioxide dustiness be less than or equal to 10mg/L, now
Emptying carbon dioxide gas temperature is about 80 DEG C, and gas pressure is 0.04MPag.
By emptying carbon dioxide that methanol content is 260ppm without cooling step, directly enter washing from bottom
Tower, is fully contacted washing with the desalted water come in from top of tower, wherein controls the quality of desalted water and emptying carbon dioxide
Ratio is 0.05, and tests methanol content in tower top carbon dioxide out, result be methanol content be 180ppm.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, the most also may be used
To make other changes in different forms, cannot all of embodiment be given exhaustive here, every belong to this
What bright technical scheme was extended out obviously changes or changes the row still in protection scope of the present invention.
Claims (10)
1. one kind processes the system of methanol in coal gasification emptying carbon dioxide, it is characterised in that including:
Chiller, including inlet end and the ammonia cooler of emptying carbon dioxide；
Wash mill, including water scrubber.
System the most according to claim 1, it is characterised in that described chiller also includes anhydrous ammonia tank, described liquefied ammonia
Basin is connected with ammonia cooler by choke valve.
System the most according to claim 1, it is characterised in that be provided with desalted water flow control valve and liquid in described water scrubber
Position regulation valve.
System the most according to claim 1, it is characterised in that described water scrubber is packed tower.
5. one kind processes the method for methanol in coal gasification emptying carbon dioxide, it is characterised in that include step in detail below:
1) emptying carbon dioxide is cooled to less than 30 DEG C；
2) carbon dioxide after cooling is fully contacted washing with desalted water.
Method the most according to claim 5, it is characterised in that step 1) in emptying carbon dioxide pressure be not less than
0.03MPag。
Method the most according to claim 5, it is characterised in that step 1) in emptying carbon dioxide is cooled to 25 DEG C
Below.
Method the most according to claim 5, it is characterised in that step 1) in emptying carbon dioxide is cooled to 20 DEG C
Below.
Method the most according to claim 5, it is characterised in that step 2) in carbon dioxide and methanol be fully contacted
Method is, the carbon dioxide after cooling enters water scrubber from below, and desalted water enters water scrubber top, and the two is at water scrubber
Inside it is fully contacted.
Method the most according to claim 5, it is characterised in that step 2) in by Flux Valve Control desalted water
Flow so that desalted water and carbon dioxide gas body mass ratio are 0.02～0.10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670912.9A CN106215631A (en) | 2016-08-15 | 2016-08-15 | System and method for treating methanol in pulverized coal gasification vented carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670912.9A CN106215631A (en) | 2016-08-15 | 2016-08-15 | System and method for treating methanol in pulverized coal gasification vented carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106215631A true CN106215631A (en) | 2016-12-14 |
Family
ID=57547705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610670912.9A Pending CN106215631A (en) | 2016-08-15 | 2016-08-15 | System and method for treating methanol in pulverized coal gasification vented carbon dioxide |
Country Status (1)
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| CN (1) | CN106215631A (en) |
Cited By (1)
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Application publication date: 20161214 |