CN220968646U - Device for purifying hydrogen sulfide and recycling excessive hydrogen - Google Patents
Device for purifying hydrogen sulfide and recycling excessive hydrogen Download PDFInfo
- Publication number
- CN220968646U CN220968646U CN202323044334.2U CN202323044334U CN220968646U CN 220968646 U CN220968646 U CN 220968646U CN 202323044334 U CN202323044334 U CN 202323044334U CN 220968646 U CN220968646 U CN 220968646U
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- China
- Prior art keywords
- tower
- methanol
- hydrogen
- buffer tank
- hydrogen sulfide
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 59
- 239000001257 hydrogen Substances 0.000 title claims abstract description 59
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 37
- 238000004064 recycling Methods 0.000 title description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 288
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 230000018044 dehydration Effects 0.000 claims abstract description 26
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 26
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 238000010992 reflux Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 238000003795 desorption Methods 0.000 abstract description 12
- 238000000746 purification Methods 0.000 abstract 1
- 208000005156 Dehydration Diseases 0.000 description 16
- 150000002431 hydrogen Chemical class 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 1
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
An apparatus for purifying hydrogen sulfide and recovering excess hydrogen; comprises an absorption tower, an analysis tower, a methanol dehydration tower and a methanol recovery tower; the bottom of the absorption tower is connected with a hydrogen sulfide outlet, and the top of the absorption tower is provided with a low-temperature methanol inlet and a hydrogen outlet; the hydrogen outlet is connected with a front buffer tank of the hydrogen compressor; the upper part of the desorption tower is connected with a desorption tower discharge cooler, the lower part of the desorption tower is provided with a methanol output port, and the methanol output port is respectively connected with a methanol dehydration tower and a desorption tower preheater; the top of the methanol dehydration tower is provided with a tower top condenser, and the bottom of the methanol dehydration tower is provided with a tower bottom discharge pump; the condenser at the top of the methanol dehydration tower is connected with a reflux tank, the reflux tank is connected with a preheater of the analysis tower through a reflux pump and partially reflows, the methanol recovery tower is respectively communicated with a hydrogen buffer tank and a front buffer tank of a hydrogen compressor, and the front buffer tank of the hydrogen compressor is communicated with the hydrogen buffer tank through the hydrogen compressor. The scheme solves the problem of complicated purification process in the prior art.
Description
Technical Field
The utility model belongs to the technical field of chemical devices, and particularly relates to a device for purifying hydrogen sulfide and recycling excessive hydrogen.
Background
Hydrogen sulfide is a common raw material for synthesizing sulfur-containing compounds, and is important in the production and manufacture of pesticides, medicines, cosmetics and polymers. However, since hydrogen sulfide itself is a flammable and toxic gas, it is not easy to transport and store, and in large-scale industrial production, hydrogen sulfide is generally obtained by purifying tail gas containing hydrogen sulfide or by self-preparing hydrogen sulfide.
In the hydrogen sulfide synthesis device, the crude hydrogen sulfide generated by the reaction contains excessive hydrogen, and the hydrogen sulfide can be used only after being purified. Meanwhile, most of the existing hydrogen sulfide purifying devices are used for chemical absorption, and the absorption agents such as MDEA and the like and wet hydrogen sulfide can corrode equipment and pipelines in the absorption and analysis processes, so that the analyzed hydrogen sulfide gas can obtain pure hydrogen sulfide after dehydration treatment, the process is complex, and the investment is large.
Disclosure of utility model
The utility model aims to provide a device for purifying hydrogen sulfide and recycling excessive hydrogen so as to solve the problems in the prior art.
The utility model is realized by the following technical scheme: an apparatus for purifying hydrogen sulfide and recovering excess hydrogen; the method is characterized in that: comprises an absorption tower, an analysis tower, a methanol dehydration tower and a methanol recovery tower;
The bottom of the absorption tower is connected with a hydrogen sulfide outlet of the bag filter, and the top of the absorption tower is provided with a low-temperature methanol inlet and a hydrogen outlet; the hydrogen outlet is connected with a front buffer tank of the hydrogen compressor; a heat exchanger is arranged inside the bottom of the absorption tower;
The desorption tower is provided with a methanol rich liquid input port, the upper part of the desorption tower is provided with a built-in condenser connected with a desorption tower discharge cooler, the lower part of the desorption tower is provided with a reboiler and a methanol output port, and the methanol output port is respectively connected with a methanol dehydration tower and a desorption tower preheater;
the top of the methanol dehydration tower is provided with a tower top condenser, and the bottom of the methanol dehydration tower is provided with a tower bottom discharge pump; the condenser at the top of the methanol dehydration tower is connected with a reflux tank, the reflux tank is connected with a preheater of the resolution tower through a reflux pump, and the water-containing methanol at the bottom of the tower enters a wastewater treatment system.
The methanol recovery tower is internally provided with a molecular sieve, and is respectively communicated with the hydrogen buffer tank and the front buffer tank of the hydrogen compressor, and the front buffer tank of the hydrogen compressor is communicated with the hydrogen buffer tank through the hydrogen compressor.
Further: the methanol recovery towers are in two groups and are used alternatively.
The beneficial effects of the utility model are as follows:
1) The pressure of the analytic tower can be adjusted to enable hydrogen sulfide to enter a subsequent working section to replace the original compressor conveying mode;
2) No additional dehydration drying step is required compared to the absorption mode using various aqueous absorbents;
3) The methanol is selected as the absorption liquid, so that the problems of equipment and pipeline corrosion caused by absorbent and wet hydrogen sulfide can be avoided;
4) The methanol used as the absorption liquid is recycled, so that the consumption of the methanol is saved, and the cost is saved;
5) The molecular sieve in the methanol recovery tower can adsorb methanol in the recovered hydrogen, so that the methanol cannot enter the hydrogen sulfide reactor, and if the methanol enters the high-temperature hydrogen sulfide reactor, the methanol can coke on the surface of the catalyst, thereby reducing the catalytic effect and the service life of the catalyst.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic view of the overall part structure of the present utility model;
fig. 3 is a flow chart of the operation of the present utility model.
Detailed Description
As shown in fig. 1-3, the present utility model discloses an apparatus for purifying hydrogen sulfide and recovering excess hydrogen; the device for purifying hydrogen sulfide and recycling excessive hydrogen comprises an absorption tower, an absorption tower bottom discharge pump, a desorption tower preheater, a methanol primary condenser, a methanol secondary condenser, a methanol tertiary condenser, a desorption tower bottom reboiler, a desorption tower discharge cooler, a methanol dehydration tower top condenser, a methanol dehydration tower bottom reboiler, a methanol dehydration tower reflux tank discharge pump, a methanol dehydration tower bottom discharge pump, a hydrogen compressor front buffer tank, a hydrogen compressor rear buffer tank, a methanol recovery tower regeneration preheater and a hydrogen buffer tank.
The absorption tower 21 is connected with a hydrogen sulfide outlet of a bag filter, hydrogen sulfide containing hydrogen from the bag filter enters from the bottom of the tower, low-temperature methanol 22 enters from the top of the tower and reversely contacts with the hydrogen sulfide, hydrogen 23 containing trace methanol is obtained from the top of the tower, a mixture 24 of methanol and hydrogen sulfide is obtained from the bottom of the tower, the mixture is cooled by a built-in heat exchanger 25 at the bottom of the tower, enters a discharge pump 26 at the bottom of the absorption tower, enters a preheater 27 of the absorption tower, exchanges heat with hot methanol 28 at the bottom of the absorption tower, and enters a resolution tower 29, wherein the temperature of the absorption tower is-10-50 ℃ and the pressure is 0.1-2 Mpa;
the upper part of the analysis tower is provided with a built-in condenser 30 connected with a discharge cooler 31 of the analysis tower, the tower top component cooled by the cooler is pure product hydrogen sulfide 32, the lower part of the analysis tower is provided with a reboiler 33 and a methanol output port, the methanol contains a trace amount of water brought into a reaction system from raw materials, in order to prevent the accumulation of water in the system, a part of methanol 34 directly enters the analysis tower preheater, the other part 35 enters a methanol dehydration tower 36 for dehydration, and the temperature of the analysis tower is 20-150 ℃ and the pressure is 0.1-2 MpaG;
the methanol dehydration tower is provided with a tower top condenser 37, a tower bottom reboiler 38, a reflux tank 39, a reflux pump 40 and a tower bottom discharge pump 41, methanol recovered from the tower top of the methanol dehydration tower and the other part of methanol at the bottom of the resolution tower are converged and then enter the resolution tower preheater, and water-containing methanol 42 at the tower bottom enters the wastewater treatment system, wherein the temperature of the methanol dehydration tower is 20-150 ℃ and the pressure is 0.1-2 Mpa;
The hot methanol at the bottom of the analysis tower sequentially enters a first-stage methanol condenser 43, a second-stage methanol condenser 44 and a third-stage methanol condenser 45 after exchanging heat with a mixture of methanol and hydrogen sulfide obtained at the bottom of the absorption tower, wherein fresh methanol and a methanol supplementing liquid 46 enter the absorption tower from the third-stage methanol condenser, and the temperature of the first-stage methanol to the third-stage methanol condenser ranges from-5 ℃ to 70 ℃ and the pressure ranges from 0.1 Mpa to 2 Mpa;
The method comprises the steps that hydrogen containing trace methanol is obtained at the top of an absorption tower, the hydrogen enters a front buffer tank 48 of a hydrogen compressor before entering the hydrogen compressor 47, the hydrogen enters a rear buffer tank 49 of the hydrogen compressor after being pressurized by the hydrogen compressor, the pressure and the flow are stabilized, the gas-liquid separation is carried out, the hydrogen enters a methanol recovery tower 50, the liquid methanol 51 obtained through the gas-liquid separation returns to the bottom of the absorption tower, the temperature of the hydrogen compressor system is-5-50 ℃, and the pressure is 0.1-2 Mpa G;
The methanol recovery tower can absorb methanol in the recovered hydrogen, so that the methanol cannot enter the hydrogen sulfide reactor, if the methanol enters the high-temperature hydrogen sulfide reactor, the methanol may coke on the surface of the catalyst, and the catalytic effect and the service life of the catalyst are reduced.
The method comprises the steps that two methanol recovery towers are adopted, one methanol recovery tower is regenerated when the other methanol recovery tower is used, part of pure hydrogen 52 at the ejection port of the methanol recovery tower is heated by a methanol recovery tower regeneration preheater 53 and then purged to enable methanol in the methanol recovery tower to be desorbed, hydrogen 54 for the regeneration of the methanol recovery tower enters a buffer tank before a hydrogen compressor, most of methanol is removed after being pressurized by the hydrogen compressor, and then enters the methanol recovery tower again to obtain pure hydrogen, wherein the temperature of the methanol recovery tower is 20-150 ℃, and the pressure is 0.1-2 MpaG;
Pure hydrogen obtained by the methanol recovery tower is converged with fresh hydrogen 56 in a hydrogen buffer tank 55, and enters the reactor after pressure stabilization, wherein the temperature of the hydrogen buffer tank is 20-50 ℃ and the pressure is 0.1-2 MpaG.
Claims (2)
1. An apparatus for purifying hydrogen sulfide and recovering excess hydrogen; the method is characterized in that: comprises an absorption tower (21), a resolution tower (29), a methanol dehydration tower (36) and a methanol recovery tower (50);
The bottom of the absorption tower (21) is connected with a hydrogen sulfide outlet of the bag filter, and the top of the absorption tower is provided with a low-temperature methanol (22) inlet and a hydrogen outlet; the hydrogen outlet is connected with a front buffer tank (48) of the hydrogen compressor; a heat exchanger (25) is arranged inside the bottom of the absorption tower (21);
The analysis tower (29) is provided with a methanol rich liquid input port, the upper part is provided with a built-in condenser (30) which is connected with a discharge cooler (31) of the analysis tower, the lower part is provided with a reboiler (33) and a methanol output port which is respectively connected with a methanol dehydration tower and a preheater (27) of the analysis tower;
The top of the methanol dehydration tower (36) is provided with a tower top condenser (37), and the bottom of the methanol dehydration tower is provided with a tower bottom discharge pump (41); the tower top condenser (37) of the methanol dehydration tower is connected with a reflux tank (39), the reflux tank (39) is connected with the preheater of the resolution tower through a reflux pump (40), and the water-containing methanol (42) at the tower bottom enters the wastewater treatment system;
The methanol recovery tower (50) is internally provided with a molecular sieve, the methanol recovery tower (50) is respectively communicated with the hydrogen buffer tank (55) and the hydrogen compressor front buffer tank (48), and the hydrogen compressor front buffer tank (48) is communicated with the hydrogen buffer tank (55) through a hydrogen compressor.
2. An apparatus for purifying hydrogen sulfide and recovering excess hydrogen gas as defined in claim 1, wherein: the methanol recovery towers (50) are in two groups and are used alternatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323044334.2U CN220968646U (en) | 2023-11-11 | 2023-11-11 | Device for purifying hydrogen sulfide and recycling excessive hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323044334.2U CN220968646U (en) | 2023-11-11 | 2023-11-11 | Device for purifying hydrogen sulfide and recycling excessive hydrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220968646U true CN220968646U (en) | 2024-05-17 |
Family
ID=91041192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323044334.2U Active CN220968646U (en) | 2023-11-11 | 2023-11-11 | Device for purifying hydrogen sulfide and recycling excessive hydrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220968646U (en) |
-
2023
- 2023-11-11 CN CN202323044334.2U patent/CN220968646U/en active Active
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