CN215086104U - Device for desulfurizing by ammonia water - Google Patents
Device for desulfurizing by ammonia water Download PDFInfo
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- CN215086104U CN215086104U CN202022968938.6U CN202022968938U CN215086104U CN 215086104 U CN215086104 U CN 215086104U CN 202022968938 U CN202022968938 U CN 202022968938U CN 215086104 U CN215086104 U CN 215086104U
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- gas
- ammonia
- phenol
- water
- sulfur
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 235000011114 ammonium hydroxide Nutrition 0.000 title claims abstract description 59
- 230000003009 desulfurizing effect Effects 0.000 title description 4
- 239000007789 gas Substances 0.000 claims abstract description 114
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 104
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000011084 recovery Methods 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000011593 sulfur Substances 0.000 claims abstract description 57
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 57
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 56
- XABJJJZIQNZSIM-UHFFFAOYSA-N azane;phenol Chemical compound [NH4+].[O-]C1=CC=CC=C1 XABJJJZIQNZSIM-UHFFFAOYSA-N 0.000 claims abstract description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003245 coal Substances 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 27
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 23
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000005201 scrubbing Methods 0.000 claims abstract description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 36
- 230000023556 desulfurization Effects 0.000 claims description 36
- 239000003034 coal gas Substances 0.000 claims description 29
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 19
- 238000002309 gasification Methods 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 5
- 230000009615 deamination Effects 0.000 claims description 5
- 238000006481 deamination reaction Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 abstract description 13
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The utility model provides an utilize aqueous ammonia to carry out desulfurated device, it includes: a sulfur recovery unit for converting acid gas from low temperature methanol scrubbing, expanded gas from gas-water separation, and acid gas from phenol-ammonia recovery into elemental sulfur while producing a sulfur-containing tail gas; and the ammonia desulphurization unit is used for converting the sulfur-containing tail gas and the sulfur-containing flue gas from the coal-fired boiler into ammonium sulfate products by using ammonia water from phenol ammonia recovery. The utility model discloses the aqueous ammonia that produces with phenol ammonia recovery unit handles the sulphur flue gas that contains that comes from coal fired boiler and the sulphur tail gas that contains that comes from sulphur recovery unit as the raw materials, not only can the ammonia of rational utilization recovery, can retrieve the commodity product that becomes high added value, promptly, ammonium sulfate with the pollutant that contains sulphur flue gas and sulphur tail gas simultaneously. The device of the utility model has very good economic and social benefits.
Description
Technical Field
The utility model belongs to the chemical industry field. Specifically, the utility model relates to an utilize aqueous ammonia to carry out desulfurated device.
Background
The production process of the coal chemical engineering project is complex, and the three wastes generated are relatively difficult to treat. Taking the crushed coal pressure gasification process as an example, the crushed coal generates crude gas (the effective component is H) under the action of steam and oxygen as gasification agents2And CO), the light components in the coal are converted into phenol, ammonia, tar and other substances. The phenol, ammonia, tar and other substances are washed, purified and the like, and most of the substances are changed into liquid and enter the coal gas water. The gas water is required to recover phenol and ammonia firstly and then to be processed in the next step.
The coal gasification wastewater has the defects of difficult biological decomposition, high pollutant concentration and the like. Ammonia and phenolic substances in the coal gasification wastewater are pollutants to be treated primarily. The matched phenol ammonia recovery device can effectively remove and recover to obtain ammonia water and phenol substances.
The auxiliary production facility matched with the coal chemical industry also comprises a necessary coal-fired boiler. The flue gas generated by the combustion of the coal-fired boiler contains SO2And the pollutants are discharged after being treated.
At present, a device capable of jointly utilizing the ammonia water obtained from the phenol ammonia recovery device and the sulfur-containing flue gas generated by a coal-fired boiler is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize aqueous ammonia to carry out desulfurated device. The device can recycle the ammonia water obtained in the phenol ammonia recovery device. And (3) taking the ammonia water obtained in the phenol ammonia recovery device as a raw material for ammonia desulphurization to remove sulfur in the sulfur-containing gas.
The above object of the present invention is achieved by the following technical solutions.
The utility model provides an utilize aqueous ammonia to carry out desulfurated device, it includes:
a sulfur recovery unit for converting acid gas from low temperature methanol scrubbing, expanded gas from gas-water separation, and acid gas from phenol-ammonia recovery into elemental sulfur while producing a sulfur-containing tail gas; and
and the ammonia desulphurization unit is used for converting the sulfur-containing tail gas and the sulfur-containing flue gas from the coal-fired boiler into ammonium sulfate products by using ammonia water recovered from phenol ammonia.
Preferably, in the apparatus for performing desulfurization using ammonia of the present invention, the ammonia desulfurization unit includes:
the flue equipment is used for collecting the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler and sending the sulfur-containing tail gas and the sulfur-containing flue gas to desulfurization equipment;
the desulfurization equipment is used for absorbing the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler through the ammonia water recovered from phenol ammonia to obtain an ammonium sulfate solution; and
and the ammonium sulfate processing equipment is used for carrying out crystallization treatment on the ammonium sulfate solution.
Preferably, in the device for desulfurization using ammonia of the present invention, the device further comprises:
the coal gasification unit is used for converting raw coal into raw coal gas and dust-containing coal gas water;
a low-temperature methanol washing unit for purifying the raw gas to obtain a purified gas and the acid gas from the low-temperature methanol washing;
the gas-water separation unit is used for separating the dust-containing gas water into gas water containing phenol and ammonia and the expanded gas from the gas-water separation; and
and the phenol ammonia recovery unit is used for separating the gas water containing phenol ammonia into the acid gas from phenol ammonia recovery and the ammonia water from phenol ammonia recovery.
Preferably, in the device for desulfurization using ammonia water of the present invention, the phenol ammonia recovery unit includes:
the deacidification equipment is used for separating the gas water containing the phenol ammonia into the acidic gas from the phenol ammonia recovery and the deacidified gas water; and
and the deamination equipment is used for obtaining the deaminated coal gas water and the ammonia water recovered from the phenol ammonia from the deacidified coal gas water.
Preferably, in the device for desulfurization by using ammonia water of the present invention, the phenol ammonia recovery unit further comprises:
and the extraction equipment is used for removing phenol from the deaminated coal gas water by using an extracting agent to obtain crude phenol.
Preferably, in the device for desulfurization by using ammonia water of the present invention, the phenol ammonia recovery unit further comprises:
a solvent stripping apparatus for recovering the extractant.
Preferably, in the device for desulfurization using ammonia of the present invention, the device further comprises:
a methanation unit for generating methane from the purge gas under the action of a catalyst.
In a specific embodiment of the present invention, the coal gasification unit is used for combusting coal under the action of the gasification agent to produce raw gas. The low-temperature methanol washing unit is used for purifying the crude gas generated by the coal gasification unit to provide a purified gas, and discharging acid gas to be sent to the sulfur recovery unit for recovery. The methanation unit is used for generating a methane product from the purified gas from the low-temperature methanol washing under the action of the catalyst. The coal gas water separation unit is used for expanding dust-containing coal gas water from the coal gasification unit to atmospheric pressure through the separator, and separating oil and dust in the coal gas water by means of different gravity of each component in the coal gas water. The expanded gas from the gas-water separation is sent to a sulfur recovery unit, and the residual gas water containing phenol and ammonia is sent to a phenol and ammonia recovery unit. The phenol-ammonia recovery unit is used for removing and recovering most phenols, ammonia and the like from the gas water containing phenol-ammonia through processes of flash evaporation, steam stripping, rectification, extraction and the like, and the generated ammonia water is sent to the ammonia desulphurization unit. The sulfur recovery unit is used for treating the acid gas from the low-temperature methanol washing unit, the acid gas from the gas-water separation unit and the acid gas from the phenol-ammonia recovery unit to ensure that H in the acid gas2S is converted into elemental sulfur, and simultaneously, the sulfur-containing tail gas is sent to an ammonia desulphurization unit for treatment, so that the discharged waste gas reaches the national discharge standard.
The utility model discloses an among the concrete embodiment, coal fired boiler unit is used for burning coal to produce steam and uses in order to supply the chemical industry district, and simultaneously, the sulphur flue gas that contains that produces passes through ammonia process desulfurization unit and retrieves the SO in the flue gas in order to utilize the aqueous ammonia2And then converted into ammonium sulfate products. The flue gas passing through the ammonia desulphurization unit reaches the national emission standard.
In a particular embodiment of the present invention, the apparatus further comprises a line connected to the ammonia desulfurization unit by a phenol ammonia recovery unit. The pipeline is used for sending the ammonia water from the phenol ammonia recovery unit to the ammonia desulphurization unit.
In a specific embodiment of the utility model, phenol ammonia recovery unit includes deacidification equipment, deamination equipment, extraction equipment, solvent stripping equipment. The deacidification equipment is used for heating coal gas water and CO from the coal gasification unit2And H2The acid gases such as S are desorbed from the water. The deamination equipment is used for further separating deacidified gas water, desorbing the gas water by heating ammonia gas, performing condensation and absorption to prepare ammonia water, such as ammonia water with the mass concentration of 15%. The extraction equipment is used for further dephenolizing the deaminated gas water, and the removed coarse powder is recovered. The solvent stripping equipment is used for recovering the extractant for recycling.
In a specific embodiment of the present invention, the ammonia desulfurization unit includes a flue facility, a desulfurization facility, and an ammonium sulfate processing facility. The flue equipment is used for collecting the flue gas of the coal-fired boiler and the sulfur-containing tail gas of the sulfur recovery unit and sending the flue gas and the sulfur-containing tail gas to the desulfurization equipment. The desulfurization equipment is used for absorbing sulfur in the flue gas by spraying ammonia water, and the desulfurized flue gas can be directly discharged under the national environmental protection requirement. The ammonium sulfate processing equipment is used for crystallizing the ammonium sulfate solution to obtain an ammonium sulfate product.
The utility model discloses following beneficial technological effect has:
the utility model discloses the aqueous ammonia that produces with phenol ammonia recovery unit handles the sulphur flue gas that contains that comes from coal fired boiler and the sulphur tail gas that contains that comes from sulphur recovery unit as the raw materials, not only can the ammonia of rational utilization recovery, can retrieve the commodity product that becomes high added value, promptly, ammonium sulfate with the pollutant that contains sulphur flue gas and sulphur tail gas simultaneously. The device of the utility model has very good economic and social benefits.
The utility model discloses a product of upper reaches environment-friendly device output can directly be utilized to the device, as low reaches environment-friendly device's raw materials, changing waste into valuables has not only solved some listed problems such as aqueous ammonia storage, sale, transportation to can absorb the sulphur component output ammonium sulfate product in the flue gas.
Drawings
Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic view of an apparatus for desulfurization using ammonia water according to an embodiment of the present invention;
fig. 2 is a schematic view of an apparatus for desulfurization using ammonia according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, which are given for the purpose of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the utility model provides an utilize aqueous ammonia to carry out desulfurated device, it includes:
a sulfur recovery unit for converting acid gas from low temperature methanol scrubbing, expanded gas from gas-water separation, and acid gas from phenol-ammonia recovery into elemental sulfur while producing a sulfur-containing tail gas; and
and the ammonia desulphurization unit is used for converting the sulfur-containing tail gas and the sulfur-containing flue gas from the coal-fired boiler into ammonium sulfate products by using ammonia water recovered from phenol ammonia.
In the device for desulfurization by using ammonia water of the present invention, preferably, the ammonia desulfurization unit includes:
the flue equipment is used for collecting the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler and sending the sulfur-containing tail gas and the sulfur-containing flue gas to desulfurization equipment;
the desulfurization equipment is used for absorbing the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler through the ammonia water recovered from phenol ammonia to obtain an ammonium sulfate solution; and
and the ammonium sulfate processing equipment is used for carrying out crystallization treatment on the ammonium sulfate solution.
Referring to fig. 2, the utility model provides an utilize aqueous ammonia to carry out desulfurated device, it includes:
a sulfur recovery unit for converting acid gas from low temperature methanol scrubbing, expanded gas from gas-water separation, and acid gas from phenol-ammonia recovery into elemental sulfur while producing a sulfur-containing tail gas;
the ammonia desulphurization unit is used for converting the sulfur-containing tail gas and the sulfur-containing flue gas from the coal-fired boiler into ammonium sulfate products by using ammonia water from phenol ammonia recovery;
the coal gasification unit is used for converting raw coal into raw coal gas and dust-containing coal gas water;
a low-temperature methanol washing unit for purifying the raw gas to obtain a purified gas and the acid gas from the low-temperature methanol washing;
the gas-water separation unit is used for separating the dust-containing gas water into gas water containing phenol and ammonia and the expanded gas from the gas-water separation; and
and the phenol ammonia recovery unit is used for separating the gas water containing phenol ammonia into the acid gas from phenol ammonia recovery and the ammonia water from phenol ammonia recovery.
In the device for desulfurization by using ammonia water of the present invention, preferably, the phenol ammonia recovery unit includes:
the deacidification equipment is used for separating the gas water containing the phenol ammonia into the acidic gas from the phenol ammonia recovery and the deacidified gas water; and
and the deamination equipment is used for obtaining the deaminated coal gas water and the ammonia water recovered from the phenol ammonia from the deacidified coal gas water.
In the device for desulfurization by using ammonia water of the present invention, preferably, the phenol ammonia recovery unit further comprises:
and the extraction equipment is used for removing phenol from the deaminated coal gas water by using an extracting agent to obtain crude phenol.
In the device for desulfurization by using ammonia water of the present invention, preferably, the phenol ammonia recovery unit further comprises:
a solvent stripping apparatus for recovering the extractant.
In the device for desulfurization by using ammonia water of the present invention, preferably, the device further comprises:
a methanation unit for generating methane from the purge gas under the action of a catalyst.
Referring to fig. 2, in one embodiment of the present invention, the apparatus of the present invention comprises a coal gasification unit, a low temperature methanol washing unit, a methanation unit, a gas-water separation unit, a phenol-ammonia recovery unit, a sulfur recovery unit, and an ammonia desulfurization unit.
The coal gasification unit is used for combusting coal under the action of a gasification agent to generate crude coal gas, the crude coal gas is sent to the low-temperature methanol washing unit, and gas water generated in the gasification process is sent to the gas water separation unit.
Taking a certain large-scale coal-to-natural gas project in China as an example, 645t/h of raw coal is gasified to produce crude coal gas 620000Nm3And/h, sending the gas to a low-temperature methanol washing unit, and outputting 1200t/h of dust-containing gas water to a gas water separation unit.
The low temperature methanol wash unit is used to gasify 620000Nm from coal gasification3H raw gas clean-up to provide clean gas 420000Nm3H sent to a methanation unit and acid gas discharged 32680Nm3H sent to a sulfur recovery unit.
The methanation unit is used for generating 166700Nm methane product from the purified gas from the low-temperature methanol washing unit under the action of a catalyst3/h。
The coal gas water separation unit is used for expanding 1200t/h dust-containing coal gas water from the coal gasification unit to atmospheric pressure through the separator, and separating oil and dust in the coal gas water depending on different gravity of each component in the coal gas water. Inflation gas at 2000Nm3The amount of the water/h is sent to a sulfur recovery unit, and the residual coal gas water containing phenol ammonia is sent to the phenol ammonia recovery unit in an amount of 600 t/h.
The phenol-ammonia recovery unit is used for producing crude phenol at 1.562t/h by carrying out processes such as flash evaporation, steam stripping, rectification, extraction and the like on gas water containing phenol-ammonia, and the produced ammonia water (15 wt%) is sent to the gas water at 20t/hAn ammonia desulphurization unit for producing acid gas with the speed of 3000Nm3The amount/h is sent to a sulphur recovery unit.
The sulfur recovery unit is used for treating acid gas of the low-temperature methanol washing unit, the gas-water separation unit and the phenol-ammonia recovery unit, and the total amount of the acid gas is about 20000Nm3H is used as the reference value. Sulfur recovery unit for H in acid gases2S is converted into elemental sulfur, 6.9t/h of sulfur product is produced, and 50624Nm is produced at the same time3And/h, sending the sulfur-containing tail gas to an ammonia desulphurization unit for treatment, so that the discharged waste gas reaches the national discharge standard.
The coal-fired boiler unit is used for producing steam by burning coal so as to be used in a chemical area. The produced smoke gas has 280 ten thousand Nm3SO after the amount of/h is treated by an ammonia desulfurization unit2Concentration < 190mg/Nm3(dry basis), the recovery rate of ammonia is more than 98 percent, and the escape rate of ammonia is less than 8mg/Nm3。
The ammonia desulphurization unit is used for recovering SO in the sulfur-containing flue gas by 50t/h ammonia water generated by the phenol ammonia recovery unit2And the conversion is carried out to obtain 28.2t/h ammonium sulfate product.
In a specific embodiment of the present invention, the specifications for the self-produced ammonia are shown in table 1.
TABLE 1 comparison of desulfurizing agent specification requirements with ammonia self-produced
| Components | Specification requirement of desulfurizing agent | Self-produced ammonia water |
| H2S: | 20mg/l | 50mg/l |
| Oil: | ≤50mg/l | 50mg/l |
| total phenols: | ≤20mg/l | 50mg/l |
from the above table, the self-produced ammonia H2And the indexes of S and total phenol exceed the standard.
In the specific embodiment, the self-produced ammonia water of the phenol ammonia recovery unit is 20t/h, and the full load requirement of the ammonia desulphurization unit cannot be completely met, so that 30t/h of outsourced ammonia water is also needed. The specifications of the purchased ammonia water are shown in Table 2.
TABLE 2 specification for purchased ammonia water
As can be seen from the above table, the purchased ammonia water contained no H2S and phenolic substances.
In the specific embodiment, after the self-produced ammonia water and the purchased ammonia water are mixed, the technical requirements of the ammonia desulphurization device on the desulfurizer are met.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An apparatus for desulfurization using ammonia water, comprising:
a sulfur recovery unit for converting acid gas from low temperature methanol scrubbing, expanded gas from gas-water separation, and acid gas from phenol-ammonia recovery into elemental sulfur while producing a sulfur-containing tail gas; and
the ammonia desulphurization unit is used for converting the sulfur-containing tail gas and the sulfur-containing flue gas from the coal-fired boiler into ammonium sulfate products by using ammonia water from phenol ammonia recovery;
characterized in that the device further comprises:
the coal gasification unit is used for converting raw coal into raw coal gas and dust-containing coal gas water;
a low-temperature methanol washing unit for purifying the raw gas to obtain a purified gas and the acid gas from the low-temperature methanol washing;
the gas-water separation unit is used for separating the dust-containing gas water into gas water containing phenol and ammonia and the expanded gas from the gas-water separation; and
and the phenol ammonia recovery unit is used for separating the gas water containing phenol ammonia into the acid gas from phenol ammonia recovery and the ammonia water from phenol ammonia recovery.
2. The apparatus for desulfurization using aqueous ammonia according to claim 1, wherein the ammonia desulfurization unit comprises:
the flue equipment is used for collecting the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler and sending the sulfur-containing tail gas and the sulfur-containing flue gas to desulfurization equipment;
the desulfurization equipment is used for absorbing the sulfur-containing tail gas and sulfur-containing flue gas from the coal-fired boiler through the ammonia water recovered from phenol ammonia to obtain an ammonium sulfate solution; and
and the ammonium sulfate processing equipment is used for carrying out crystallization treatment on the ammonium sulfate solution.
3. The apparatus for desulfurization using aqueous ammonia according to claim 1, wherein the phenol ammonia recovery unit comprises:
the deacidification equipment is used for separating the gas water containing the phenol ammonia into the acidic gas from the phenol ammonia recovery and the deacidified gas water; and
and the deamination equipment is used for obtaining the deaminated coal gas water and the ammonia water recovered from the phenol ammonia from the deacidified coal gas water.
4. The apparatus for desulfurization using aqueous ammonia according to claim 3, wherein said phenol ammonia recovery unit further comprises:
and the extraction equipment is used for removing phenol from the deaminated coal gas water by using an extracting agent to obtain crude phenol.
5. The apparatus for desulfurization using aqueous ammonia according to claim 4, wherein said phenol ammonia recovery unit further comprises:
a solvent stripping apparatus for recovering the extractant.
6. The apparatus for desulfurization using aqueous ammonia according to claim 1, wherein said apparatus further comprises:
a methanation unit for generating methane from the purge gas under the action of a catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022968938.6U CN215086104U (en) | 2020-12-10 | 2020-12-10 | Device for desulfurizing by ammonia water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022968938.6U CN215086104U (en) | 2020-12-10 | 2020-12-10 | Device for desulfurizing by ammonia water |
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| CN215086104U true CN215086104U (en) | 2021-12-10 |
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| CN202022968938.6U Expired - Fee Related CN215086104U (en) | 2020-12-10 | 2020-12-10 | Device for desulfurizing by ammonia water |
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Granted publication date: 20211210 |