CN203639435U - Device for combining normal temperature/low temperature methanol washing to process crude synthesis gas containing oil - Google Patents
Device for combining normal temperature/low temperature methanol washing to process crude synthesis gas containing oil Download PDFInfo
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- CN203639435U CN203639435U CN201320851257.9U CN201320851257U CN203639435U CN 203639435 U CN203639435 U CN 203639435U CN 201320851257 U CN201320851257 U CN 201320851257U CN 203639435 U CN203639435 U CN 203639435U
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Abstract
The utility model provides a device for combining normal temperature/low temperature methanol washing to process a crude synthesis gas containing oil. The device is characterized by comprising a low-temperature methanol washing device, wherein a normal temperature methanol prewashing tower is arranged in front of the low-temperature methanol washing device; the normal temperature methanol prewashing tower is used for removing light oil, and is arranged in front of or behind a sulfur-proof conversion device. BTX impurities in the crude synthesis gas can be effectively purified by the normal temperature methanol prewashing tower disclosed by the utility model, meanwhile, the moisture in the crude synthesis gas can be absorbed, the cooling loss caused by the BTX impurities contained in the crude synthesis gas purified by the traditional low-temperature CO2-enriched methanol solution is overcome, the normal temperature methanol prewashing tower can be arranged at the front and rear positions of the sulfur-proof conversion device according to the difference of gasification modes. Thus, the operation is more stable.
Description
Technical field
The utility model relates to a kind of coal synthetic gas process field, relates in particular to a kind of normal temperature methyl alcohol and washes the device of purification containing BTX crude synthesis gas that combine with low-temperature rectisol.Oil or BTX related in the utility model are the mixture of the Hydrocarbon Organic such as benzene,toluene,xylene, multichain alkane.
Background technology
Coal is the world saving the widest fossil energy of distribution at most, the age forming according to coal and different region particularities, and quality and the kind of coal are diversity.Coal can be summarized as three large main applications according to its application target: (1) steam coal, and (2) coking coal, (3) Coal Chemical Industry coal, mainly comprises coal for gasification, low-temperature pyrolysis coal, coal etc. for hydrogenation liquefaction.
Wherein, coal for gasification can be converted into the heat latent in coal the latent heat of coal gas to greatest extent.The gasification of coal refers under certain temperature, pressure, coal carried out to thermochemistry processing with vaporized chemical, by the organic process that changes coal gas in coal.Its connotation is exactly take coal, semicoke or coke as raw material, take air, oxygen enrichment, water vapour, carbonic acid gas or hydrogen as gasifying medium, make coal through partial oxidation and reduction reaction, it is become to the heterogeneous reaction process that the combustibleconstituentss such as carbon monoxide, hydrogen, methane are master's gaseous product at Substance Transformations such as institute's carbon containing, hydrogen.Carrying out to the gas products obtaining further processed, and can make other gas, liquid comburant (-rent) or Chemicals.
Because kind and the quality thereof of coal are various, develop different gasification technologies for adapting to different atures of coal, for example, coal water slurry gasification technology, crushed coal pressure gasifying technology, powdered coal pressuring gasified technology, Hygas gasification technology etc.But for the application of low grade coal, the general gasification technologies such as crushed coal pressure gasifying technology, Hygas method, coal oil mixture that adopt at present.The above-mentioned type gasification technology is due to features such as its gasification temperature are low, and the raw gas of production all contains more wet goods impurity.
Oily substance great majority in rough coal are benzene, toluene, wet goods organism, and we are referred to as BTX(by the oily substance obtaining in raw gas and are referred to as below BTX), methyl alcohol has good solvability to BTX.For the processing of the raw gas that contains BTX, generally after sulfur-resisting transformation, remove at low temperature washing device for methanol, it installs as shown in Figure 1, and concrete method steps is as follows:
(1) raw gas that carrys out autopneumatolysis enters changing device and carries out water gas shift reation, from after changing device crude synthesis gas 1 and antifreeze methanol mixed through crude synthesis gas pre-cooler 2, enter into CO
2in the pre-wash section 3 bottom of absorption tower;
(2) first use from CO
2the rich CO of low temperature of absorption tower 4 epimeres
2methanol solution 5, removes the oil impurities in crude synthesis gas;
(3) crude synthesis gas being removed after BTX class impurity enters CO again
2absorption tower 4 epimeres carry out desulfurization, decarburization to reach final purification crude synthesis gas object;
(4) from CO
2absorption tower 4 tower reactors are out containing the rich CO of BTX low temperature
2methanol solution 5, delivers to light oil and processes workshop section 7, reclaims containing the rich CO of BTX low temperature
2bTX class material in methanol solution 5, lean solution methyl alcohol and semi lean solution methyl alcohol are from CO
2lean solution methyl alcohol input aperture 9 and the semi lean solution methyl alcohol input aperture 10 of absorption tower 4 epimeres enter in absorption tower, and the final purified gas obtaining of processing is from CO
2cO is sent in the purified gas air outlet 8 at 4 tops, absorption tower
2absorption tower 4.
The technology that existing low-temperature rectisol removes light oil has following deficiency:
(1) adopt CO
2the rich CO of absorption tower epimere low temperature
2methyl alcohol absorbs the crude synthesis gas after precooling, and tower reactor will be containing the rich CO of BTX low temperature
2methyl alcohol is delivered to light oil and is processed workshop section, reclaims containing the rich CO of BTX low temperature
2bTX class material in methyl alcohol, this gang of rich CO of low temperature
2the cold that methyl alcohol is entrained, and process in removal process CO at light oil
2resolve the cold producing and all cannot be recycled by low-temperature rectisol main flow, therefore, it will increase the overall energy consumption of low temperature washing device for methanol; Higher containing BTX amount in crude synthesis gas, the rich CO of required low temperature
2methanol solution amount is also just larger, and low-temperature rectisol entirety energy consumption is also just higher.
(2) under low-temperature condition, the rich CO of above-mentioned low temperature
2methyl alcohol will absorb a small amount of CO in crude synthesis gas through pre-wash section
2, reduced CO
2dividing potential drop.Increase the required energy consumption that absorbs crude synthesis gas.Due to the rich CO of this strand of low temperature
2methyl alcohol is finally delivered to light oil treatment unit after prewashing, causes the CO absorbing
2resolving the cold producing cannot utilize, and has further increased plant energy consumption.
(3) owing to adopting low temperature absorption, crude synthesis gas enters before precooling, need to add methanol solution.In order to prevent water freezing in crude synthesis gas, on the other hand for dry raw synthetic gas, make to enter CO on the one hand
2the absorption tower water yield is as far as possible little.If directly adopt part containing the rich CO of BTX low temperature
2methyl alcohol, as antifreeze methyl alcohol, need to be set up a topping-up pump, has increased facility investment and Operation and Maintenance expense.And if adopt lean solution methyl alcohol as antifreeze methyl alcohol, this part methyl alcohol is by absorption portion CO
2, the loss that can increase cold.
Utility model content
The purpose of this utility model is to solve existing defect in prior art, uses the rich CO of low temperature to change
2methyl alcohol is as the usual manner of pre-wash section absorption agent, to reduce loss of refrigeration capacity.
The utility model provides a kind of normal temperature/low-temperature rectisol to combine and has processed the device of oil-containing crude synthesis gas, comprises low temperature washing device for methanol, normal temperature methyl alcohol prewashing tower;
Described low temperature washing device for methanol is for desulfurization, carbonization treatment;
Described normal temperature methyl alcohol prewashing tower is used for removing light oil;
Described device also comprises a Purge gas air outlet and at least one crude synthesis gas inlet mouth, after low temperature washing device for methanol is located in described Purge gas air outlet, described normal temperature methyl alcohol prewashing tower and device are between crude synthesis gas inlet mouth and low temperature washing device for methanol.
In above-mentioned device, also comprise at least one sulfur-resisting transformation device, before or after described normal temperature methyl alcohol prewashing tower is located at sulfur-resisting transformation device.
In above-mentioned device, can comprise a sulfur-resisting transformation device, described low temperature washing device for methanol can be connected with normal temperature methyl alcohol prewashing tower, and before described sulfur-resisting transformation device is positioned at normal temperature methyl alcohol prewashing tower, described crude synthesis gas inlet mouth is arranged on sulfur-resisting transformation device;
Preferably, in above-mentioned device, can also comprise two sulfur-resisting transformation devices, before one of them sulfur-resisting transformation device is located at normal temperature prewashing tower, on two sulfur-resisting transformation devices described in another sulfur-resisting transformation device is connected with described low temperature washing device for methanol, be equipped with described crude synthesis gas inlet mouth.
In above-mentioned device, between described low temperature washing device for methanol and normal temperature prewashing tower apparatus, also can be provided with the switch of resistance to sulphur, before described normal temperature methyl alcohol prewashing tower is positioned at the switch of resistance to sulphur, described thick synthetic inlet mouth is arranged on normal temperature methyl alcohol prewashing tower;
Preferably, in above-mentioned device, on described normal temperature methyl alcohol prewashing tower and sulfur-resisting transformation device, be equipped with described crude synthesis gas import.
One comparatively in preferred embodiment, described normal temperature methyl alcohol absorption tower connects light oil treatment system, for the auxiliary light oil reclaiming after normal temperature methyl alcohol absorbs.
Preferably, described sulfur-resisting transformation processing is to be H by the CO gas conversion of too high levels in crude synthesis gas
2and CO
2gas, to produce available gas.Preferably, described oil-containing (BTX) crude synthesis gas is to obtain by the furnace gas of one or more types in lurgi gasifier, BGL stove, Yunnan stove, Hygas or coal oil mixture.
Preferably, described not oil-containing (BTX) crude synthesis gas be by coal water slurry gasification or powdered coal pressuring gasified in one or both gasification modes obtain.
Preferably, the described volume content that contains BTX impurity after normal temperature methyl alcohol prewashing tower is processed in crude synthesis gas is less than or equal to 1ppm.
Preferably, described oil-containing (BTX) impurity comprises benzene, toluene, oil, H
2s, CO
2and H
2the poly-doped impurity of at least two kinds in O.
In device described in the utility model, low-temperature rectisol CO
2absorption tower is not provided with pre-wash section, therefore, and without at low-temperature rectisol CO
2in absorption tower, adopt the rich CO of low temperature
2methanol solution removes the impurity containing BTX in thick synthesizing.
Device described in the utility model is located at prewashing treatment step outside low temperature washing device for methanol, uses external normal temperature methyl alcohol prewashing tower to replace the pre-wash section in low temperature washing device for methanol.
Normal temperature/low-temperature rectisol described in the utility model combines and processes the device of oil-containing crude synthesis gas, and its principle adopting is because normal temperature methyl alcohol has very strong solvability to BTX, but to CO
2, H
2s specific absorption a little less than, therefore can utilize normal temperature methyl alcohol first to absorb the BTX class material in gasification installation crude synthesis gas.Be brought into the CO in light oil treatment system by methyl alcohol
2measure less, thereby can effectively avoid in conventional low-temp methanol pre-wash section due to CO
2resolve and the cold of loss.In addition, be normal temperature methyl alcohol due to what adopt, so there is not the loss of cold.Can save about 10% cold.
In addition, due to methyl alcohol and water mutual solubility very strong, normal temperature methyl alcohol both can be used as the absorption agent of oil-containing crude synthesis gas, also can remove the moisture in crude synthesis gas simultaneously, it is entered before rectisol system does not need to add antifreeze methyl alcohol again, thus the energy consumption of saving or reduce facility investment.
Described in the utility modelly process the device of oil-containing crude synthesis gas for normal temperature/low-temperature rectisol combines, solve traditional low temperature washing device for methanol and adopt the rich CO of low temperature
2methanol solution is at CO
2absorption tower pre-wash section removes the loss of refrigeration capacity bringing containing BTX material; Make CO simultaneously
2the design of absorption tower pre-wash section and normal temperature methyl alcohol prewashing tower tower diameter is more reasonable, makes operation more stable.
Combine advantage or the beneficial effect of the device of processing oil-containing crude synthesis gas of normal temperature/low-temperature rectisol described in the utility model is summarized as follows:
1, cancel traditional low-temperature rectisol CO
2absorption tower pre-wash section and cancellation adopt the rich CO of low temperature
2methanol solution remove in thick synthetic containing BTX impurity;
2, normal temperature methyl alcohol prewashing tower is set and adopt normal temperature methanol stripper in slightly synthetic containing BTX impurity;
3, due to adopt normal temperature methanol stripper in slightly synthetic containing BTX impurity, avoid the rich CO of low temperature
2methanol solution brings to light oil by cold and processes workshop section, reduces cold consumption;
4, according to gasification mode difference, the position of configuration normal temperature methyl alcohol prewashing tower before and after changing device, appropriate design normal temperature methyl alcohol prewashing tower tower diameter, makes operation more stable.
Accompanying drawing explanation
Fig. 1 is that in prior art, low-temperature rectisol is processed oil-containing crude synthesis gas device schematic diagram;
Fig. 2 is that in the embodiment of the present invention 1, normal temperature/low-temperature rectisol combines and processes the schematic flow sheet of oil-containing crude synthesis gas;
Fig. 3 is that in the embodiment of the present invention 2, normal temperature/low-temperature rectisol combines and processes the schematic flow sheet of oil-containing crude synthesis gas;
Fig. 4 is that in the embodiment of the present invention 3, normal temperature/low-temperature rectisol combines and processes the schematic flow sheet of oil-containing crude synthesis gas;
Fig. 5 is that in the embodiment of the present invention 4, normal temperature/low-temperature rectisol combines and processes the schematic flow sheet of oil-containing crude synthesis gas;
Fig. 6 is that in the embodiment of the present invention 5, normal temperature/low-temperature rectisol combines and processes the schematic flow sheet of oil-containing crude synthesis gas;
Accompanying drawing indicates implication: 1-crude synthesis gas, 2-crude synthesis gas pre-cooler, 3-pre-wash section, 4-CO
2absorption tower, the rich CO of 5-low temperature
2methyl alcohol, 6-removes low-temperature rectisol resolution system, and 7-goes light oil to process workshop section, 8-clean gas outlet, 9-lean solution methyl alcohol input aperture, 10-semi lean solution methyl alcohol input aperture, 11-oil-containing crude synthesis gas inlet mouth, 12-is oil-containing crude synthesis gas inlet mouth not, the 13-switch of resistance to sulphur, 14-normal temperature methyl alcohol prewashing tower, 15-low temperature washing device for methanol, 16-Purge gas air outlet.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further, but not as restriction of the present utility model.
embodiment 1
Fig. 2 is the schematic flow sheet of the present embodiment 1, as shown in Figure 2, in treatment unit for oil-containing crude synthesis gas, the crude synthetic gas of oil-containing enters normal temperature methyl alcohol prewashing tower 14 and carries out after prewashing from oil-containing crude synthesis gas inlet mouth 11, enter again in low temperature washing device for methanol 15, carry out after desulfurization, carbonization treatment, the synthetic gas of the purification obtaining is exported low temperature washing device for methanol 15 from clean gas outlet 16, enters next workshop section.
The present embodiment 1 is mainly for oil-containing crude synthesis gas, by cancelling traditional low-temperature rectisol CO
2absorption tower pre-wash section, cancels utilizing before carrying out low-temp methanol washing process, first adopting the method for normal temperature methyl alcohol prewashing to process oil-containing crude synthetic gas.
In the present embodiment, newly-increased normal temperature methyl alcohol prewashing tower 14 can effectively purify in crude synthesis gas containing BTX impurity, can effectively absorb moisture, thereby dry raw synthetic gas has overcome and in traditional technology, used the rich CO of low temperature
2methanol solution purifies the loss of refrigeration capacity bringing containing BTX impurity in crude synthesis gas.
The present embodiment 2 is on the basis of the device described in embodiment 1, between normal temperature methyl alcohol prewashing tower and oil-containing crude synthesis gas inlet mouth, adds sulfur-resisting transformation device, before sulfur-resisting transformation device is positioned at normal temperature methyl alcohol prewashing tower.
In the present embodiment mainly for containing BTX crude synthesis gas, by cancelling traditional low-temperature rectisol CO
2absorption tower pre-wash section, cancels and utilizes the rich CO of low temperature
2methanol solution absorb BTX class impurity in raw gas, raw gas is entered in sulfur-resisting transformation device 131 and normal temperature methyl alcohol prewashing tower 14, and adopts normal temperature lean solution methyl alcohol to absorb the BTX class impurity in raw gas.
In the present embodiment, gasify source from single gasification mode containing BTX crude synthesis gas, such as lurgi gasifier, BGL stove, Yunnan stove etc.Single gasification oil-containing crude synthesis gas inlet mouth 11 is connected with sulfur-resisting transformation device 131 inlet ends, oil-containing crude synthetic gas carries out after conversion process in sulfur-resisting transformation device 131, enter again normal temperature methyl alcohol prewashing tower 14 and carry out prewashing, finally enter low temperature washing device for methanol 15, carry out after desulfurization, carbonization treatment the synthetic gas being purified.
The above-mentioned crude synthesis gas containing BTX from lurgi gasifier, BGL stove or Yunnan furnace gas enters sulfur-resisting transformation device 13 to carry out after water-gas shift, volume content containing BTX in crude synthesis gas is approximately 0.1%-0.2%, enter into normal temperature methyl alcohol prewashing tower 14 and remove BTX class material, deliver to downstream light oil containing the normal temperature methyl alcohol of BTX class impurity and process workshop section, reclaim BTX class material and methyl alcohol, the methanol loop after recovery is used.In crude synthesis gas after treatment, BTX class material volume content can be down to below 1ppm.
Described low temperature washing device for methanol also comprises water cooler, low-temperature rectisol CO
2absorption tower.
Wherein, described low-temperature rectisol CO
2absorption tower is without pre-wash section.
After feed gas chiller is cooling, directly enter low-temperature rectisol CO
2desulfurization, decarburization are carried out in absorption tower, reach after final purification object, and purified gas is delivered to downstream section, complete a normal temperature/low-temperature rectisol and process the operation containing BTX crude synthesis gas.
Be 160 ℃ of-230 ℃ of left and right owing to carrying out the raw gas temperature of autopneumatolysis, and its water-content is larger, in order rationally to utilize existing gas condition, does not increase the energy consumption of conversion section.Under normal temperature condition, methyl alcohol has very strong solvability to BTX, but to CO
2, H
2s specific absorption a little less than, we can utilize normal temperature methyl alcohol prewashing tower 14 first to absorb from the BTX class material in sulfur-resisting transformation device 131 crude synthesis gas for this reason.In addition, because methyl alcohol and water infinitely dissolve each other, normal temperature methyl alcohol prewashing tower 14 also can be used as the siccative of crude synthesis gas simultaneously, and crude synthesis gas is carried out to processed, reduces or cancel the use of antifreeze methyl alcohol.Therefore, the present embodiment exports at sulfur-resisting transformation device 131, also arranges and has connected normal temperature methyl alcohol prewashing tower 14.
Process crude synthesis gas later through normal temperature methyl alcohol prewashing tower 14, substantially not containing BTX class impurity and water.The feed gas chiller that can directly enter in low temperature washing device for methanol 15 is cooled to after certain temperature, then enters low-temperature rectisol CO
2absorption tower.Because crude synthesis gas is entering low-temperature rectisol CO
2before absorption tower, remove containing BTX impurity by normal temperature methyl alcohol prewashing tower, therefore, the low-temperature rectisol CO in the utility model
2pre-wash section is no longer established on absorption tower, has also cancelled the rich CO of low temperature simultaneously
2the mode of BTX class impurity in methanol wash crude synthesis gas.
Fig. 4 is that the present embodiment 3 normal temperature/low-temperature rectisol combines and processes oil-containing crude synthesis gas schematic flow sheet, as shown in Figure 4, on the basis of embodiment 2, increase again a sulfur-resisting transformation device 132 and be directly connected with low temperature washing device for methanol 15, on sulfur-resisting transformation device 132, be also provided with not oil-containing crude synthesis gas inlet mouth.
Crude synthesis gas containing BTX is provided, and gasification mode is as lurgi gasifier, BGL stove, Yunnan stove, Hygas or coal oil mixture; And the crude synthesis gas containing BTX is provided not, gasification mode is as the gasification mode that coal water slurry or powdered coal pressuring gasified etc. combines.
Be divided into two strands containing the crude synthesis gas of BTX and the crude synthesis gas containing BTX not, enter respectively sulfur-resisting transformation device 131 and sulfur-resisting transformation device 132 carries out transformationreation.
One enters sulfur-resisting transformation device 131 from oil-containing crude synthesis gas inlet mouth 11 containing crude synthetic gas of BTX, carries out after heat recuperation, enters in normal temperature methyl alcohol prewashing tower 14, remove wherein containing BTX impurity, deliver to light oil containing BTX methyl alcohol and process workshop section.Process crude synthesis gas later through normal temperature methyl alcohol prewashing tower 14 and be down to 1ppm containing the volume content of BTX impurity; Therefore, obtained by lurgi gasifier, BGL stove, Yunnan stove, Hygas or coal oil mixture gasification containing BTX crude synthesis gas, carry out after prewashing through sulfur-resisting transformation device 131 and normal temperature methyl alcohol prewashing tower 14, substantially containing BTX class impurity and water.
Another strand is after containing the crude synthesis gas of BTX, never oil-containing crude synthesis gas mouth 12 enters sulfur-resisting transformation device and processes, with above-mentioned after through sulfur-resisting transformation device 131, the crude synthetic gas containing BTX after normal temperature methyl alcohol prewashing tower 14 mixes, enter and in low temperature washing device for methanol 15, carry out desulfurization, decarburization, reach after final purification object, purified gas is delivered to downstream section through purified gas air outlet 16, completes normal temperature/low-temperature rectisol and combines and process the operation of oil-containing crude synthesis gas.
embodiment 4
Fig. 5 is the schematic flow sheet of the present embodiment 4, as shown in Figure 4, the present embodiment is on the basis of embodiment 1, between normal temperature methyl alcohol prewashing tower 14 and low temperature washing device for methanol 15, increase a sulfur-resisting transformation device, normal temperature/low-temperature rectisol described in the present embodiment combines and processes the device of oil-containing crude synthesis gas, comprise low temperature washing device for methanol 15, wherein before low temperature washing device for methanol 15, be provided with normal temperature methyl alcohol prewashing tower 14 and sulfur-resisting transformation device 131, and before normal temperature methyl alcohol prewashing tower 14 is positioned at sulfur-resisting transformation device 131.
Described normal temperature methyl alcohol prewashing tower 14 is for removing light oil, and sulfur-resisting transformation device 131 is for being transformed to H by the CO of crude synthesis gas
2deng available gas;
Before described normal temperature methyl alcohol prewashing tower 14 is located at the described changing device of resistance to rheology 131.
In described device, also comprise a Purge gas air outlet 16, wherein Purge gas air outlet be located at low-temperature rectisol fill 15 put after.
Described oil-containing crude synthesis gas inlet mouth 11 is the inlet mouth of external oil-containing crude synthetic gas.
Described oil-containing slightly synthetic inlet mouth 11 is arranged on normal temperature methyl alcohol prewashing tower 14.
Oil-containing crude synthetic gas enters normal temperature methyl alcohol prewashing tower 14 and carries out after prewashing from oil-containing crude synthesis gas inlet mouth 11, enter in low temperature washing device for methanol 15 through sulfur-resisting transformation device 131, carry out desulfurization, carbonization treatment, complete after treatment process, purified gas is discharged low temperature washing device for methanol 15 from purified gas air outlet 16, and enters in next workshop section.
Fig. 6 is that the present embodiment 5 normal temperature/low-temperature rectisol combines and processes oil-containing crude synthesis gas schematic flow sheet, the present embodiment is on the basis of embodiment 3, not oil-containing crude synthesis gas inlet mouth is set in sulfur-resisting transformation device, as shown in Figure 6, the gasification source of the present embodiment is divided into two strands and enters, and two strands gasify sources respectively: adopt oil-containing crude synthesis gas (as: Hygas, lurgi gasifier, BGL stove, Yunnan stove or coal oil mixture etc.) and not oil-containing crude synthesis gas (as: coal water slurry or coal gasification etc.) combination.
Consider that the give vent to anger raw gas of chemical industry section of hygas gasification or coal oil mixture is normal temperature substantially, first this oil-containing crude synthesis gas is directly sent to normal temperature methyl alcohol prewashing tower 14, remove the BTX class material in raw gas, then oil-containing crude synthesis gas is not respectively or be mixed into sulfur-resisting transformation device 131 with another thigh, after conversion, enter and in conventional low temperature washing device for methanol 15, carry out the Purge gas that obtains after desulfurization, decarburization, discharge through purified gas air outlet 16, and send in next workshop section.
In the present embodiment, be provided with normal temperature methyl alcohol prewashing tower 14 containing on BTX crude synthesis gas stream, thereby reducing the gas phase load of normal temperature methyl alcohol prewashing tower 14, can also further reduce tower diameter and improve the stability of operation, saving facility investment, reducing energy consumption.
Be 0.05%-0.5% at the volume content containing the BTX impurity in BTX crude synthesis gas through Hygas gasification or coal oil mixture, directly enter newly-increased normal temperature methyl alcohol prewashing tower 14, remove wherein containing BTX impurity, deliver to light oil containing BTX methyl alcohol and process workshop section.Process crude synthesis gas later through normal temperature methyl alcohol prewashing tower and be down to 1ppm containing BTX impurity volume content, substantially not containing BTX class impurity and water.
Therefore, the low-temperature rectisol CO in the present embodiment
2pre-wash section is no longer established on absorption tower, and cancels the rich CO of low temperature
2in methanol wash crude synthesis gas, contain the mode of BTX class impurity.
Above specific embodiment of the utility model be have been described in detail, but it is as example, the utility model is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and alternative also all among category of the present utility model.Therefore,, not departing from the equalization conversion of doing under spirit and scope of the present utility model and revising, all should be encompassed in scope of the present utility model.
Claims (6)
1. normal temperature/low-temperature rectisol combines and processes a device for oil-containing crude synthesis gas, it is characterized in that, comprises low temperature washing device for methanol, normal temperature methyl alcohol prewashing tower;
Described low temperature washing device for methanol is for desulfurization, carbonization treatment;
Described normal temperature methyl alcohol prewashing tower is used for removing light oil;
Described device also comprises a Purge gas air outlet and at least one crude synthesis gas inlet mouth, after low temperature washing device for methanol is located in described Purge gas air outlet, described normal temperature methyl alcohol prewashing tower apparatus is between crude synthesis gas inlet mouth and low temperature washing device for methanol.
2. device according to claim 1, is characterized in that, also comprises at least one sulfur-resisting transformation device, before or after described normal temperature methyl alcohol prewashing tower is located at sulfur-resisting transformation device.
3. device according to claim 2, it is characterized in that, comprise a sulfur-resisting transformation device, described low temperature washing device for methanol is connected with normal temperature methyl alcohol prewashing tower, before described sulfur-resisting transformation device is positioned at normal temperature methyl alcohol prewashing tower, described crude synthesis gas inlet mouth is arranged on sulfur-resisting transformation device.
4. device according to claim 3, it is characterized in that, comprise two sulfur-resisting transformation devices, before one of them sulfur-resisting transformation device is located at normal temperature prewashing tower, another sulfur-resisting transformation device is connected with described low temperature washing device for methanol, before normal temperature methyl alcohol prewashing tower is positioned at sulfur-resisting transformation device, described normal temperature washing device for methanol is provided with described crude synthesis gas inlet mouth.
5. device according to claim 2, it is characterized in that, between described low temperature washing device for methanol and normal temperature prewashing tower apparatus, be also provided with the switch of resistance to sulphur, before described normal temperature methyl alcohol prewashing tower is positioned at the switch of resistance to sulphur, described thick synthetic inlet mouth is arranged on normal temperature methyl alcohol prewashing tower.
6. device according to claim 5, is characterized in that, described normal temperature methyl alcohol prewashing tower and sulfur-resisting transformation device are provided with described thick synthetic inlet mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851257.9U CN203639435U (en) | 2013-12-20 | 2013-12-20 | Device for combining normal temperature/low temperature methanol washing to process crude synthesis gas containing oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851257.9U CN203639435U (en) | 2013-12-20 | 2013-12-20 | Device for combining normal temperature/low temperature methanol washing to process crude synthesis gas containing oil |
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|---|---|---|---|
| CN201320851257.9U Withdrawn - After Issue CN203639435U (en) | 2013-12-20 | 2013-12-20 | Device for combining normal temperature/low temperature methanol washing to process crude synthesis gas containing oil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695042A (en) * | 2013-12-20 | 2014-04-02 | 上海国际化建工程咨询公司 | Device and method for treating oil-containing crude synthesis gas by combining normal-temperature/low-temperature methanol washing |
| CN106318473A (en) * | 2016-08-18 | 2017-01-11 | 赛鼎工程有限公司 | Process for removing oil and water from gas and recycling oil by adopting low-temperature methanol |
| CN106608618A (en) * | 2015-10-21 | 2017-05-03 | 中国石油化工股份有限公司 | Acid gas purification process |
-
2013
- 2013-12-20 CN CN201320851257.9U patent/CN203639435U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695042A (en) * | 2013-12-20 | 2014-04-02 | 上海国际化建工程咨询公司 | Device and method for treating oil-containing crude synthesis gas by combining normal-temperature/low-temperature methanol washing |
| CN103695042B (en) * | 2013-12-20 | 2015-06-03 | 上海国际化建工程咨询公司 | Device and method for treating oil-containing crude synthesis gas by combining normal-temperature/low-temperature methanol washing |
| CN106608618A (en) * | 2015-10-21 | 2017-05-03 | 中国石油化工股份有限公司 | Acid gas purification process |
| CN106318473A (en) * | 2016-08-18 | 2017-01-11 | 赛鼎工程有限公司 | Process for removing oil and water from gas and recycling oil by adopting low-temperature methanol |
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